src/modules/m_spanningtree.cpp

   1 /*   +------------------------------------+
   2  *   | Inspire Internet Relay Chat Daemon |
   3  *   +------------------------------------+
   4  *
   5  *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
   6  *                     E-mail:
   7  *                <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *            the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 /* $ModDesc: Povides a spanning tree server link protocol */
  18
  19 using namespace std;
  20
  21 #include <stdio.h>
  22 #include <vector>
  23 #include <deque>
  24 #include "globals.h"
  25 #include "inspircd_config.h"
  26 #include "hash_map.h"
  27 #include "configreader.h"
  28 #include "users.h"
  29 #include "channels.h"
  30 #include "modules.h"
  31 #include "commands.h"
  32 #include "commands/cmd_whois.h"
  33 #include "commands/cmd_stats.h"
  34 #include "socket.h"
  35 #include "helperfuncs.h"
  36 #include "inspircd.h"
  37 #include "inspstring.h"
  38 #include "hashcomp.h"
  39 #include "message.h"
  40 #include "xline.h"
  41 #include "typedefs.h"
  42 #include "cull_list.h"
  43 #include "aes.h"
  44
  45 #define nspace __gnu_cxx
  46
  47 /*
  48  * The server list in InspIRCd is maintained as two structures
  49  * which hold the data in different ways. Most of the time, we
  50  * want to very quicky obtain three pieces of information:
  51  *
  52  * (1) The information on a server
  53  * (2) The information on the server we must send data through
  54  *     to actually REACH the server we're after
  55  * (3) Potentially, the child/parent objects of this server
  56  *
  57  * The InspIRCd spanning protocol provides easy access to these
  58  * by storing the data firstly in a recursive structure, where
  59  * each item references its parent item, and a dynamic list
  60  * of child items, and another structure which stores the items
  61  * hashed, linearly. This means that if we want to find a server
  62  * by name quickly, we can look it up in the hash, avoiding
  63  * any O(n) lookups. If however, during a split or sync, we want
  64  * to apply an operation to a server, and any of its child objects
  65  * we can resort to recursion to walk the tree structure.
  66  */
  67
  68 class ModuleSpanningTree;
  69 static ModuleSpanningTree* TreeProtocolModule;
  70
  71 extern ServerConfig* Config;
  72 extern InspIRCd* ServerInstance;
  73 extern std::vector<Module*> modules;
  74 extern std::vector<ircd_module*> factory;
  75 extern int MODCOUNT;
  76
  77 /* Any socket can have one of five states at any one time.
  78  * The LISTENER state indicates a socket which is listening
  79  * for connections. It cannot receive data itself, only incoming
  80  * sockets.
  81  * The CONNECTING state indicates an outbound socket which is
  82  * waiting to be writeable.
  83  * The WAIT_AUTH_1 state indicates the socket is outbound and
  84  * has successfully connected, but has not yet sent and received
  85  * SERVER strings.
  86  * The WAIT_AUTH_2 state indicates that the socket is inbound
  87  * (allocated by a LISTENER) but has not yet sent and received
  88  * SERVER strings.
  89  * The CONNECTED state represents a fully authorized, fully
  90  * connected server.
  91  */
  92 enum ServerState { LISTENER, CONNECTING, WAIT_AUTH_1, WAIT_AUTH_2, CONNECTED };
  93
  94 /* We need to import these from the core for use in netbursts */
  95 extern user_hash clientlist;
  96 extern chan_hash chanlist;
  97
  98 /* Foward declarations */
  99 class TreeServer;
 100 class TreeSocket;
 101
 102 /* This variable represents the root of the server tree
 103  * (for all intents and purposes, it's us)
 104  */
 105 TreeServer *TreeRoot;
 106
 107 static Server* Srv;
 108
 109 /* This hash_map holds the hash equivalent of the server
 110  * tree, used for rapid linear lookups.
 111  */
 112 typedef nspace::hash_map<std::string, TreeServer*, nspace::hash<string>, irc::StrHashComp> server_hash;
 113 server_hash serverlist;
 114
 115 typedef nspace::hash_map<std::string, userrec*> uid_hash;
 116 typedef nspace::hash_map<std::string, char*> sid_hash;
 117
 118 /* More forward declarations */
 119 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> &params, std::string target);
 120 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> &params, std::string omit);
 121 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> &params);
 122 bool DoOneToAllButSenderRaw(std::string data, std::string omit, std::string prefix, irc::string command, std::deque<std::string> &params);
 123 void ReadConfiguration(bool rebind);
 124
 125 /* Flatten links and /MAP for non-opers */
 126 bool FlatLinks;
 127 /* Hide U-Lined servers in /MAP and /LINKS */
 128 bool HideULines;
 129
 130 /* Imported from xline.cpp for use during netburst */
 131 extern std::vector<KLine> klines;
 132 extern std::vector<GLine> glines;
 133 extern std::vector<ZLine> zlines;
 134 extern std::vector<QLine> qlines;
 135 extern std::vector<ELine> elines;
 136 extern std::vector<KLine> pklines;
 137 extern std::vector<GLine> pglines;
 138 extern std::vector<ZLine> pzlines;
 139 extern std::vector<QLine> pqlines;
 140 extern std::vector<ELine> pelines;
 141
 142 std::vector<std::string> ValidIPs;
 143
 144 class UserManager : public classbase
 145 {
 146         uid_hash uids;
 147         sid_hash sids;
 148  public:
 149         UserManager()
 150         {
 151                 uids.clear();
 152                 sids.clear();
 153         }
 154
 155         std::string UserToUID(userrec* user)
 156         {
 157                 return "";
 158         }
 159
 160         std::string UIDToUser(const std::string &UID)
 161         {
 162                 return "";
 163         }
 164
 165         std::string CreateAndAdd(userrec* user)
 166         {
 167                 return "";
 168         }
 169
 170         std::string CreateAndAdd(const std::string &servername)
 171         {
 172                 return "";
 173         }
 174
 175         std::string ServerToSID(const std::string &servername)
 176         {
 177                 return "";
 178         }
 179
 180         std::string SIDToServer(const std::string &SID)
 181         {
 182                 return "";
 183         }
 184
 185         userrec* FindByID(const std::string &UID)
 186         {
 187                 return NULL;
 188         }
 189 };
 190
 191
 192 /* Each server in the tree is represented by one class of
 193  * type TreeServer. A locally connected TreeServer can
 194  * have a class of type TreeSocket associated with it, for
 195  * remote servers, the TreeSocket entry will be NULL.
 196  * Each server also maintains a pointer to its parent
 197  * (NULL if this server is ours, at the top of the tree)
 198  * and a pointer to its "Route" (see the comments in the
 199  * constructors below), and also a dynamic list of pointers
 200  * to its children which can be iterated recursively
 201  * if required. Creating or deleting objects of type
 202  i* TreeServer automatically maintains the hash_map of
 203  * TreeServer items, deleting and inserting them as they
 204  * are created and destroyed.
 205  */
 206
 207 class TreeServer : public classbase
 208 {
 209         TreeServer* Parent;                     /* Parent entry */
 210         TreeServer* Route;                      /* Route entry */
 211         std::vector<TreeServer*> Children;      /* List of child objects */
 212         irc::string ServerName;                 /* Server's name */
 213         std::string ServerDesc;                 /* Server's description */
 214         std::string VersionString;              /* Version string or empty string */
 215         int UserCount;                          /* Not used in this version */
 216         int OperCount;                          /* Not used in this version */
 217         TreeSocket* Socket;                     /* For directly connected servers this points at the socket object */
 218         time_t NextPing;                        /* After this time, the server should be PINGed*/
 219         bool LastPingWasGood;                   /* True if the server responded to the last PING with a PONG */
 220
 221  public:
 222
 223         /* We don't use this constructor. Its a dummy, and won't cause any insertion
 224          * of the TreeServer into the hash_map. See below for the two we DO use.
 225          */
 226         TreeServer()
 227         {
 228                 Parent = NULL;
 229                 ServerName = "";
 230                 ServerDesc = "";
 231                 VersionString = "";
 232                 UserCount = OperCount = 0;
 233                 VersionString = Srv->GetVersion();
 234         }
 235
 236         /* We use this constructor only to create the 'root' item, TreeRoot, which
 237          * represents our own server. Therefore, it has no route, no parent, and
 238          * no socket associated with it. Its version string is our own local version.
 239          */
 240         TreeServer(std::string Name, std::string Desc) : ServerName(Name.c_str()), ServerDesc(Desc)
 241         {
 242                 Parent = NULL;
 243                 VersionString = "";
 244                 UserCount = OperCount = 0;
 245                 VersionString = Srv->GetVersion();
 246                 Route = NULL;
 247                 Socket = NULL; /* Fix by brain */
 248                 AddHashEntry();
 249         }
 250
 251         /* When we create a new server, we call this constructor to initialize it.
 252          * This constructor initializes the server's Route and Parent, and sets up
 253          * its ping counters so that it will be pinged one minute from now.
 254          */
 255         TreeServer(std::string Name, std::string Desc, TreeServer* Above, TreeSocket* Sock) : Parent(Above), ServerName(Name.c_str()), ServerDesc(Desc), Socket(Sock)
 256         {
 257                 VersionString = "";
 258                 UserCount = OperCount = 0;
 259                 this->SetNextPingTime(time(NULL) + 120);
 260                 this->SetPingFlag();
 261
 262                 /* find the 'route' for this server (e.g. the one directly connected
 263                  * to the local server, which we can use to reach it)
 264                  *
 265                  * In the following example, consider we have just added a TreeServer
 266                  * class for server G on our network, of which we are server A.
 267                  * To route traffic to G (marked with a *) we must send the data to
 268                  * B (marked with a +) so this algorithm initializes the 'Route'
 269                  * value to point at whichever server traffic must be routed through
 270                  * to get here. If we were to try this algorithm with server B,
 271                  * the Route pointer would point at its own object ('this').
 272                  *
 273                  *              A
 274                  *             / \
 275                  *          + B   C
 276                  *           / \   \
 277                  *          D   E   F
 278                  *         /         \
 279                  *      * G           H
 280                  *
 281                  * We only run this algorithm when a server is created, as
 282                  * the routes remain constant while ever the server exists, and
 283                  * do not need to be re-calculated.
 284                  */
 285
 286                 Route = Above;
 287                 if (Route == TreeRoot)
 288                 {
 289                         Route = this;
 290                 }
 291                 else
 292                 {
 293                         while (this->Route->GetParent() != TreeRoot)
 294                         {
 295                                 this->Route = Route->GetParent();
 296                         }
 297                 }
 298
 299                 /* Because recursive code is slow and takes a lot of resources,
 300                  * we store two representations of the server tree. The first
 301                  * is a recursive structure where each server references its
 302                  * children and its parent, which is used for netbursts and
 303                  * netsplits to dump the whole dataset to the other server,
 304                  * and the second is used for very fast lookups when routing
 305                  * messages and is instead a hash_map, where each item can
 306                  * be referenced by its server name. The AddHashEntry()
 307                  * call below automatically inserts each TreeServer class
 308                  * into the hash_map as it is created. There is a similar
 309                  * maintainance call in the destructor to tidy up deleted
 310                  * servers.
 311                  */
 312
 313                 this->AddHashEntry();
 314         }
 315
 316         int QuitUsers(const std::string &reason)
 317         {
 318                 log(DEBUG,"Removing all users from server %s",this->ServerName.c_str());
 319                 const char* reason_s = reason.c_str();
 320                 std::vector<userrec*> time_to_die;
 321                 for (user_hash::iterator n = clientlist.begin(); n != clientlist.end(); n++)
 322                 {
 323                         if (!strcmp(n->second->server, this->ServerName.c_str()))
 324                         {
 325                                 time_to_die.push_back(n->second);
 326                         }
 327                 }
 328                 for (std::vector<userrec*>::iterator n = time_to_die.begin(); n != time_to_die.end(); n++)
 329                 {
 330                         userrec* a = (userrec*)*n;
 331                         log(DEBUG,"Kill %s fd=%d",a->nick,a->fd);
 332                         if (!IS_LOCAL(a))
 333                                 kill_link(a,reason_s);
 334                 }
 335                 return time_to_die.size();
 336         }
 337
 338         /* This method is used to add the structure to the
 339          * hash_map for linear searches. It is only called
 340          * by the constructors.
 341          */
 342         void AddHashEntry()
 343         {
 344                 server_hash::iterator iter;
 345                 iter = serverlist.find(this->ServerName.c_str());
 346                 if (iter == serverlist.end())
 347                         serverlist[this->ServerName.c_str()] = this;
 348         }
 349
 350         /* This method removes the reference to this object
 351          * from the hash_map which is used for linear searches.
 352          * It is only called by the default destructor.
 353          */
 354         void DelHashEntry()
 355         {
 356                 server_hash::iterator iter;
 357                 iter = serverlist.find(this->ServerName.c_str());
 358                 if (iter != serverlist.end())
 359                         serverlist.erase(iter);
 360         }
 361
 362         /* These accessors etc should be pretty self-
 363          * explanitory.
 364          */
 365
 366         TreeServer* GetRoute()
 367         {
 368                 return Route;
 369         }
 370
 371         std::string GetName()
 372         {
 373                 return ServerName.c_str();
 374         }
 375
 376         std::string GetDesc()
 377         {
 378                 return ServerDesc;
 379         }
 380
 381         std::string GetVersion()
 382         {
 383                 return VersionString;
 384         }
 385
 386         void SetNextPingTime(time_t t)
 387         {
 388                 this->NextPing = t;
 389                 LastPingWasGood = false;
 390         }
 391
 392         time_t NextPingTime()
 393         {
 394                 return NextPing;
 395         }
 396
 397         bool AnsweredLastPing()
 398         {
 399                 return LastPingWasGood;
 400         }
 401
 402         void SetPingFlag()
 403         {
 404                 LastPingWasGood = true;
 405         }
 406
 407         int GetUserCount()
 408         {
 409                 return UserCount;
 410         }
 411
 412         void AddUserCount()
 413         {
 414                 UserCount++;
 415         }
 416
 417         void DelUserCount()
 418         {
 419                 UserCount--;
 420         }
 421
 422         int GetOperCount()
 423         {
 424                 return OperCount;
 425         }
 426
 427         TreeSocket* GetSocket()
 428         {
 429                 return Socket;
 430         }
 431
 432         TreeServer* GetParent()
 433         {
 434                 return Parent;
 435         }
 436
 437         void SetVersion(std::string Version)
 438         {
 439                 VersionString = Version;
 440         }
 441
 442         unsigned int ChildCount()
 443         {
 444                 return Children.size();
 445         }
 446
 447         TreeServer* GetChild(unsigned int n)
 448         {
 449                 if (n < Children.size())
 450                 {
 451                         /* Make sure they  cant request
 452                          * an out-of-range object. After
 453                          * all we know what these programmer
 454                          * types are like *grin*.
 455                          */
 456                         return Children[n];
 457                 }
 458                 else
 459                 {
 460                         return NULL;
 461                 }
 462         }
 463
 464         void AddChild(TreeServer* Child)
 465         {
 466                 Children.push_back(Child);
 467         }
 468
 469         bool DelChild(TreeServer* Child)
 470         {
 471                 for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 472                 {
 473                         if (*a == Child)
 474                         {
 475                                 Children.erase(a);
 476                                 return true;
 477                         }
 478                 }
 479                 return false;
 480         }
 481
 482         /* Removes child nodes of this node, and of that node, etc etc.
 483          * This is used during netsplits to automatically tidy up the
 484          * server tree. It is slow, we don't use it for much else.
 485          */
 486         bool Tidy()
 487         {
 488                 bool stillchildren = true;
 489                 while (stillchildren)
 490                 {
 491                         stillchildren = false;
 492                         for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 493                         {
 494                                 TreeServer* s = (TreeServer*)*a;
 495                                 s->Tidy();
 496                                 Children.erase(a);
 497                                 DELETE(s);
 498                                 stillchildren = true;
 499                                 break;
 500                         }
 501                 }
 502                 return true;
 503         }
 504
 505         ~TreeServer()
 506         {
 507                 /* We'd better tidy up after ourselves, eh? */
 508                 this->DelHashEntry();
 509         }
 510 };
 511
 512 /* The Link class might as well be a struct,
 513  * but this is C++ and we don't believe in structs (!).
 514  * It holds the entire information of one <link>
 515  * tag from the main config file. We maintain a list
 516  * of them, and populate the list on rehash/load.
 517  */
 518
 519 class Link : public classbase
 520 {
 521  public:
 522          irc::string Name;
 523          std::string IPAddr;
 524          int Port;
 525          std::string SendPass;
 526          std::string RecvPass;
 527          unsigned long AutoConnect;
 528          time_t NextConnectTime;
 529          std::string EncryptionKey;
 530          bool HiddenFromStats;
 531 };
 532
 533 /* The usual stuff for inspircd modules,
 534  * plus the vector of Link classes which we
 535  * use to store the <link> tags from the config
 536  * file.
 537  */
 538 ConfigReader *Conf;
 539 std::vector<Link> LinkBlocks;
 540
 541 /* Yay for fast searches!
 542  * This is hundreds of times faster than recursion
 543  * or even scanning a linked list, especially when
 544  * there are more than a few servers to deal with.
 545  * (read as: lots).
 546  */
 547 TreeServer* FindServer(std::string ServerName)
 548 {
 549         server_hash::iterator iter;
 550         iter = serverlist.find(ServerName.c_str());
 551         if (iter != serverlist.end())
 552         {
 553                 return iter->second;
 554         }
 555         else
 556         {
 557                 return NULL;
 558         }
 559 }
 560
 561 /* Returns the locally connected server we must route a
 562  * message through to reach server 'ServerName'. This
 563  * only applies to one-to-one and not one-to-many routing.
 564  * See the comments for the constructor of TreeServer
 565  * for more details.
 566  */
 567 TreeServer* BestRouteTo(std::string ServerName)
 568 {
 569         if (ServerName.c_str() == TreeRoot->GetName())
 570                 return NULL;
 571         TreeServer* Found = FindServer(ServerName);
 572         if (Found)
 573         {
 574                 return Found->GetRoute();
 575         }
 576         else
 577         {
 578                 return NULL;
 579         }
 580 }
 581
 582 /* Find the first server matching a given glob mask.
 583  * Theres no find-using-glob method of hash_map [awwww :-(]
 584  * so instead, we iterate over the list using an iterator
 585  * and match each one until we get a hit. Yes its slow,
 586  * deal with it.
 587  */
 588 TreeServer* FindServerMask(std::string ServerName)
 589 {
 590         for (server_hash::iterator i = serverlist.begin(); i != serverlist.end(); i++)
 591         {
 592                 if (Srv->MatchText(i->first.c_str(),ServerName))
 593                         return i->second;
 594         }
 595         return NULL;
 596 }
 597
 598 /* A convenient wrapper that returns true if a server exists */
 599 bool IsServer(std::string ServerName)
 600 {
 601         return (FindServer(ServerName) != NULL);
 602 }
 603
 604
 605 class cmd_rconnect : public command_t
 606 {
 607         Module* Creator;
 608  public:
 609         cmd_rconnect (Module* Callback) : command_t("RCONNECT", 'o', 2), Creator(Callback)
 610         {
 611                 this->source = "m_spanningtree.so";
 612                 syntax = "<remote-server-mask> <servermask>";
 613         }
 614
 615         void Handle (const char** parameters, int pcnt, userrec *user)
 616         {
 617                 WriteServ(user->fd,"NOTICE %s :*** RCONNECT: Sending remote connect to \002%s\002 to connect server \002%s\002.",user->nick,parameters[0],parameters[1]);
 618                 /* Is this aimed at our server? */
 619                 if (Srv->MatchText(Srv->GetServerName(),parameters[0]))
 620                 {
 621                         /* Yes, initiate the given connect */
 622                         WriteOpers("*** Remote CONNECT from %s matching \002%s\002, connecting server \002%s\002",user->nick,parameters[0],parameters[1]);
 623                         const char* para[1];
 624                         para[0] = parameters[1];
 625                         Creator->OnPreCommand("CONNECT", para, 1, user, true);
 626                 }
 627         }
 628 };
 629
 630
 631
 632 /* Every SERVER connection inbound or outbound is represented by
 633  * an object of type TreeSocket.
 634  * TreeSockets, being inherited from InspSocket, can be tied into
 635  * the core socket engine, and we cn therefore receive activity events
 636  * for them, just like activex objects on speed. (yes really, that
 637  * is a technical term!) Each of these which relates to a locally
 638  * connected server is assocated with it, by hooking it onto a
 639  * TreeSocket class using its constructor. In this way, we can
 640  * maintain a list of servers, some of which are directly connected,
 641  * some of which are not.
 642  */
 643
 644 class TreeSocket : public InspSocket
 645 {
 646         std::string myhost;
 647         std::string in_buffer;
 648         ServerState LinkState;
 649         std::string InboundServerName;
 650         std::string InboundDescription;
 651         int num_lost_users;
 652         int num_lost_servers;
 653         time_t NextPing;
 654         bool LastPingWasGood;
 655         bool bursting;
 656         AES* ctx_in;
 657         AES* ctx_out;
 658         unsigned int keylength;
 659
 660  public:
 661
 662         /* Because most of the I/O gubbins are encapsulated within
 663          * InspSocket, we just call the superclass constructor for
 664          * most of the action, and append a few of our own values
 665          * to it.
 666          */
 667         TreeSocket(std::string host, int port, bool listening, unsigned long maxtime)
 668                 : InspSocket(host, port, listening, maxtime)
 669         {
 670                 myhost = host;
 671                 this->LinkState = LISTENER;
 672                 this->ctx_in = NULL;
 673                 this->ctx_out = NULL;
 674         }
 675
 676         TreeSocket(std::string host, int port, bool listening, unsigned long maxtime, std::string ServerName)
 677                 : InspSocket(host, port, listening, maxtime)
 678         {
 679                 myhost = ServerName;
 680                 this->LinkState = CONNECTING;
 681                 this->ctx_in = NULL;
 682                 this->ctx_out = NULL;
 683         }
 684
 685         /* When a listening socket gives us a new file descriptor,
 686          * we must associate it with a socket without creating a new
 687          * connection. This constructor is used for this purpose.
 688          */
 689         TreeSocket(int newfd, char* ip)
 690                 : InspSocket(newfd, ip)
 691         {
 692                 this->LinkState = WAIT_AUTH_1;
 693                 this->ctx_in = NULL;
 694                 this->ctx_out = NULL;
 695                 this->SendCapabilities();
 696         }
 697
 698         ~TreeSocket()
 699         {
 700                 if (ctx_in)
 701                         DELETE(ctx_in);
 702                 if (ctx_out)
 703                         DELETE(ctx_out);
 704         }
 705
 706         void InitAES(std::string key,std::string SName)
 707         {
 708                 if (key == "")
 709                         return;
 710
 711                 ctx_in = new AES();
 712                 ctx_out = new AES();
 713                 log(DEBUG,"Initialized AES key %s",key.c_str());
 714                 // key must be 16, 24, 32 etc bytes (multiple of 8)
 715                 keylength = key.length();
 716                 if (!(keylength == 16 || keylength == 24 || keylength == 32))
 717                 {
 718                         WriteOpers("*** \2ERROR\2: Key length for encryptionkey is not 16, 24 or 32 bytes in length!");
 719                         log(DEBUG,"Key length not 16, 24 or 32 characters!");
 720                 }
 721                 else
 722                 {
 723                         WriteOpers("*** \2AES\2: Initialized %d bit encryption to server %s",keylength*8,SName.c_str());
 724                         ctx_in->MakeKey(key.c_str(), "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
 725                                 \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", keylength, keylength);
 726                         ctx_out->MakeKey(key.c_str(), "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
 727                                 \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", keylength, keylength);
 728                 }
 729         }
 730
 731         /* When an outbound connection finishes connecting, we receive
 732          * this event, and must send our SERVER string to the other
 733          * side. If the other side is happy, as outlined in the server
 734          * to server docs on the inspircd.org site, the other side
 735          * will then send back its own server string.
 736          */
 737         virtual bool OnConnected()
 738         {
 739                 if (this->LinkState == CONNECTING)
 740                 {
 741                         /* we do not need to change state here. */
 742                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
 743                         {
 744                                 if (x->Name == this->myhost)
 745                                 {
 746                                         Srv->SendOpers("*** Connection to \2"+myhost+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] established.");
 747                                         this->SendCapabilities();
 748                                         if (x->EncryptionKey != "")
 749                                         {
 750                                                 if (!(x->EncryptionKey.length() == 16 || x->EncryptionKey.length() == 24 || x->EncryptionKey.length() == 32))
 751                                                 {
 752                                                         WriteOpers("\2WARNING\2: Your encryption key is NOT 16, 24 or 32 characters in length, encryption will \2NOT\2 be enabled.");
 753                                                 }
 754                                                 else
 755                                                 {
 756                                                         this->WriteLine("AES "+Srv->GetServerName());
 757                                                         this->InitAES(x->EncryptionKey,x->Name.c_str());
 758                                                 }
 759                                         }
 760                                         /* found who we're supposed to be connecting to, send the neccessary gubbins. */
 761                                         this->WriteLine("SERVER "+Srv->GetServerName()+" "+x->SendPass+" 0 :"+Srv->GetServerDescription());
 762                                         return true;
 763                                 }
 764                         }
 765                 }
 766                 /* There is a (remote) chance that between the /CONNECT and the connection
 767                  * being accepted, some muppet has removed the <link> block and rehashed.
 768                  * If that happens the connection hangs here until it's closed. Unlikely
 769                  * and rather harmless.
 770                  */
 771                 Srv->SendOpers("*** Connection to \2"+myhost+"\2 lost link tag(!)");
 772                 return true;
 773         }
 774
 775         virtual void OnError(InspSocketError e)
 776         {
 777                 /* We don't handle this method, because all our
 778                  * dirty work is done in OnClose() (see below)
 779                  * which is still called on error conditions too.
 780                  */
 781                 if (e == I_ERR_CONNECT)
 782                 {
 783                         Srv->SendOpers("*** Connection failed: Connection refused");
 784                 }
 785         }
 786
 787         virtual int OnDisconnect()
 788         {
 789                 /* For the same reason as above, we don't
 790                  * handle OnDisconnect()
 791                  */
 792                 return true;
 793         }
 794
 795         /* Recursively send the server tree with distances as hops.
 796          * This is used during network burst to inform the other server
 797          * (and any of ITS servers too) of what servers we know about.
 798          * If at any point any of these servers already exist on the other
 799          * end, our connection may be terminated. The hopcounts given
 800          * by this function are relative, this doesn't matter so long as
 801          * they are all >1, as all the remote servers re-calculate them
 802          * to be relative too, with themselves as hop 0.
 803          */
 804         void SendServers(TreeServer* Current, TreeServer* s, int hops)
 805         {
 806                 char command[1024];
 807                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 808                 {
 809                         TreeServer* recursive_server = Current->GetChild(q);
 810                         if (recursive_server != s)
 811                         {
 812                                 snprintf(command,1024,":%s SERVER %s * %d :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,recursive_server->GetDesc().c_str());
 813                                 this->WriteLine(command);
 814                                 this->WriteLine(":"+recursive_server->GetName()+" VERSION :"+recursive_server->GetVersion());
 815                                 /* down to next level */
 816                                 this->SendServers(recursive_server, s, hops+1);
 817                         }
 818                 }
 819         }
 820
 821         std::string MyCapabilities()
 822         {
 823                 ServerConfig* Config = Srv->GetConfig();
 824                 std::vector<std::string> modlist;
 825                 std::string capabilities = "";
 826
 827                 for (int i = 0; i <= MODCOUNT; i++)
 828                 {
 829                         if ((modules[i]->GetVersion().Flags & VF_STATIC) || (modules[i]->GetVersion().Flags & VF_COMMON))
 830                                 modlist.push_back(Config->module_names[i]);
 831                 }
 832                 sort(modlist.begin(),modlist.end());
 833                 for (unsigned int i = 0; i < modlist.size(); i++)
 834                 {
 835                         if (i)
 836                                 capabilities = capabilities + ",";
 837                         capabilities = capabilities + modlist[i];
 838                 }
 839                 return capabilities;
 840         }
 841
 842         void SendCapabilities()
 843         {
 844                 this->WriteLine("CAPAB "+MyCapabilities());
 845         }
 846
 847         bool Capab(std::deque<std::string> params)
 848         {
 849                 if (params.size() != 1)
 850                 {
 851                         this->WriteLine("ERROR :Invalid number of parameters for CAPAB");
 852                         return false;
 853                 }
 854
 855                 if (params[0] != this->MyCapabilities())
 856                 {
 857                         std::string quitserver = this->myhost;
 858                         if (this->InboundServerName != "")
 859                         {
 860                                 quitserver = this->InboundServerName;
 861                         }
 862
 863                         WriteOpers("*** \2ERROR\2: Server '%s' does not have the same set of modules loaded, cannot link!",quitserver.c_str());
 864                         WriteOpers("*** Our networked module set is: '%s'",this->MyCapabilities().c_str());
 865                         WriteOpers("*** Other server's networked module set is: '%s'",params[0].c_str());
 866                         WriteOpers("*** These lists must match exactly on both servers. Please correct these errors, and try again.");
 867                         this->WriteLine("ERROR :CAPAB mismatch; My capabilities: '"+this->MyCapabilities()+"'");
 868                         return false;
 869                 }
 870
 871                 return true;
 872         }
 873
 874         /* This function forces this server to quit, removing this server
 875          * and any users on it (and servers and users below that, etc etc).
 876          * It's very slow and pretty clunky, but luckily unless your network
 877          * is having a REAL bad hair day, this function shouldnt be called
 878          * too many times a month ;-)
 879          */
 880         void SquitServer(std::string &from, TreeServer* Current)
 881         {
 882                 /* recursively squit the servers attached to 'Current'.
 883                  * We're going backwards so we don't remove users
 884                  * while we still need them ;)
 885                  */
 886                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 887                 {
 888                         TreeServer* recursive_server = Current->GetChild(q);
 889                         this->SquitServer(from,recursive_server);
 890                 }
 891                 /* Now we've whacked the kids, whack self */
 892                 num_lost_servers++;
 893                 num_lost_users += Current->QuitUsers(from);
 894         }
 895
 896         /* This is a wrapper function for SquitServer above, which
 897          * does some validation first and passes on the SQUIT to all
 898          * other remaining servers.
 899          */
 900         void Squit(TreeServer* Current,std::string reason)
 901         {
 902                 if ((Current) && (Current != TreeRoot))
 903                 {
 904                         std::deque<std::string> params;
 905                         params.push_back(Current->GetName());
 906                         params.push_back(":"+reason);
 907                         DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
 908                         if (Current->GetParent() == TreeRoot)
 909                         {
 910                                 Srv->SendOpers("Server \002"+Current->GetName()+"\002 split: "+reason);
 911                         }
 912                         else
 913                         {
 914                                 Srv->SendOpers("Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
 915                         }
 916                         num_lost_servers = 0;
 917                         num_lost_users = 0;
 918                         std::string from = Current->GetParent()->GetName()+" "+Current->GetName();
 919                         SquitServer(from, Current);
 920                         Current->Tidy();
 921                         Current->GetParent()->DelChild(Current);
 922                         DELETE(Current);
 923                         WriteOpers("Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
 924                 }
 925                 else
 926                 {
 927                         log(DEFAULT,"Squit from unknown server");
 928                 }
 929         }
 930
 931         /* FMODE command - server mode with timestamp checks */
 932         bool ForceMode(std::string source, std::deque<std::string> &params)
 933         {
 934                 /* Chances are this is a 1.0 FMODE without TS */
 935                 if (params.size() < 3)
 936                 {
 937                         this->WriteLine("ERROR :Version 1.0 FMODE sent to version 1.1 server");
 938                         return false;
 939                 }
 940
 941                 bool smode = false;
 942                 std::string sourceserv;
 943
 944                 /* Are we dealing with an FMODE from a user, or from a server? */
 945                 userrec* who = Srv->FindNick(source);
 946                 if (who)
 947                 {
 948                         /* FMODE from a user, set sourceserv to the users server name */
 949                         sourceserv = who->server;
 950                 }
 951                 else
 952                 {
 953                         /* FMODE from a server, create a fake user to receive mode feedback */
 954                         who = new userrec();
 955                         who->fd = FD_MAGIC_NUMBER;
 956                         smode = true;           /* Setting this flag tells us we should free the userrec later */
 957                         sourceserv = source;    /* Set sourceserv to the actual source string */
 958                 }
 959                 const char* modelist[64];
 960                 time_t TS = 0;
 961                 int n = 0;
 962                 memset(&modelist,0,sizeof(modelist));
 963                 for (unsigned int q = 0; (q < params.size()) && (q < 64); q++)
 964                 {
 965                         if (q == 1)
 966                         {
 967                                 /* The timestamp is in this position.
 968                                  * We don't want to pass that up to the
 969                                  * server->client protocol!
 970                                  */
 971                                 TS = atoi(params[q].c_str());
 972                         }
 973                         else
 974                         {
 975                                 /* Everything else is fine to append to the modelist */
 976                                 modelist[n++] = params[q].c_str();
 977                         }
 978
 979                 }
 980                 /* Extract the TS value of the object, either userrec or chanrec */
 981                 userrec* dst = Srv->FindNick(params[0]);
 982                 chanrec* chan = NULL;
 983                 time_t ourTS = 0;
 984                 if (dst)
 985                 {
 986                         ourTS = dst->age;
 987                 }
 988                 else
 989                 {
 990                         chan = Srv->FindChannel(params[0]);
 991                         if (chan)
 992                         {
 993                                 ourTS = chan->age;
 994                         }
 995                 }
 996
 997                 /* TS is equal: Merge the mode changes, use voooodoooooo on modes
 998                  * with parameters.
 999                  */
1000                 if (TS == ourTS)
1001                 {
1002                         log(DEBUG,"Entering TS equality check");
1003                         ModeHandler* mh = NULL;
1004                         unsigned long paramptr = 3;
1005                         std::string to_bounce = "";
1006                         std::string to_keep = "";
1007                         std::vector<std::string> params_to_keep;
1008                         std::string params_to_bounce = "";
1009                         bool adding = true;
1010                         char cur_change = 1;
1011                         char old_change = 0;
1012                         char old_bounce_change = 0;
1013                         /* Merge modes, basically do special stuff to mode with params */
1014                         for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
1015                         {
1016                                 switch (*x)
1017                                 {
1018                                         case '-':
1019                                                 adding = false;
1020                                         break;
1021                                         case '+':
1022                                                 adding = true;
1023                                         break;
1024                                         default:
1025                                                 if (adding)
1026                                                 {
1027                                                         /* We only care about whats being set,
1028                                                          * not whats being unset
1029                                                          */
1030                                                         mh = ServerInstance->ModeGrok->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1031
1032                                                         if ((mh) && (mh->GetNumParams(adding) > 0) && (!mh->IsListMode()))
1033                                                         {
1034                                                                 /* We only want to do special things to
1035                                                                  * modes with parameters, we are going to rewrite
1036                                                                  * those parameters
1037                                                                  */
1038                                                                 ModePair ret;
1039                                                                 adding ? cur_change = '+' : cur_change = '-';
1040
1041                                                                 ret = mh->ModeSet(smode ? NULL : who, dst, chan, params[paramptr]);
1042
1043                                                                 /* The mode is set here, check which we should keep */
1044                                                                 if (ret.first)
1045                                                                 {
1046                                                                         bool which_to_keep = mh->CheckTimeStamp(TS, ourTS, params[paramptr], ret.second, chan);
1047
1048                                                                         if (which_to_keep == true)
1049                                                                         {
1050                                                                                 /* Keep ours, bounce theirs:
1051                                                                                  * Send back ours to them and
1052                                                                                  * drop their mode changs
1053                                                                                  */
1054                                                                                 adding ? cur_change = '+' : cur_change = '-';
1055                                                                                 if (cur_change != old_bounce_change)
1056                                                                                         to_bounce += cur_change;
1057                                                                                 to_bounce += *x;
1058                                                                                 old_bounce_change = cur_change;
1059
1060                                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1061                                                                                         params_to_bounce.append(" ").append(ret.second);
1062                                                                         }
1063                                                                         else
1064                                                                         {
1065                                                                                 /* Keep theirs: Accept their mode change,
1066                                                                                  * do nothing else
1067                                                                                  */
1068                                                                                 adding ? cur_change = '+' : cur_change = '-';
1069                                                                                 if (cur_change != old_change)
1070                                                                                         to_keep += cur_change;
1071                                                                                 to_keep += *x;
1072                                                                                 old_change = cur_change;
1073
1074                                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1075                                                                                         params_to_keep.push_back(params[paramptr]);
1076                                                                         }
1077                                                                 }
1078                                                                 else
1079                                                                 {
1080                                                                         /* Mode isnt set here, we want it */
1081                                                                         adding ? cur_change = '+' : cur_change = '-';
1082                                                                         if (cur_change != old_change)
1083                                                                                 to_keep += cur_change;
1084                                                                         to_keep += *x;
1085                                                                         old_change = cur_change;
1086
1087                                                                         if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1088                                                                                 params_to_keep.push_back(params[paramptr]);
1089                                                                 }
1090
1091                                                                 paramptr++;
1092                                                         }
1093                                                         else
1094                                                         {
1095                                                                 mh = ServerInstance->ModeGrok->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1096
1097                                                                 if (mh)
1098                                                                 {
1099                                                                         adding ? cur_change = '+' : cur_change = '-';
1100
1101                                                                         /* Just keep this, safe to merge with no checks
1102                                                                          * it has no parameters
1103                                                                          */
1104
1105                                                                         if (cur_change != old_change)
1106                                                                                 to_keep += cur_change;
1107                                                                         to_keep += *x;
1108                                                                         old_change = cur_change;
1109
1110                                                                         if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1111                                                                         {
1112                                                                                 log(DEBUG,"Mode removal %d %d",adding, mh->GetNumParams(adding));
1113                                                                                 params_to_keep.push_back(params[paramptr++]);
1114                                                                         }
1115                                                                 }
1116                                                         }
1117                                                 }
1118                                                 else
1119                                                 {
1120                                                         mh = ServerInstance->ModeGrok->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1121
1122                                                         if (mh)
1123                                                         {
1124                                                                 /* Taking a mode away */
1125                                                                 adding ? cur_change = '+' : cur_change = '-';
1126
1127                                                                 if (cur_change != old_change)
1128                                                                         to_keep += cur_change;
1129                                                                 to_keep += *x;
1130                                                                 old_change = cur_change;
1131
1132                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1133                                                                         params_to_keep.push_back(params[paramptr++]);
1134                                                         }
1135                                                 }
1136                                         break;
1137                                 }
1138                         }
1139
1140                         if (to_bounce.length())
1141                         {
1142                                 std::deque<std::string> newparams;
1143                                 newparams.push_back(params[0]);
1144                                 newparams.push_back(ConvToStr(ourTS));
1145                                 newparams.push_back(to_bounce+params_to_bounce);
1146                                 DoOneToOne(Srv->GetServerName(),"FMODE",newparams,sourceserv);
1147                         }
1148
1149                         if (to_keep.length())
1150                         {
1151                                 unsigned int n = 2;
1152                                 unsigned int q = 0;
1153                                 modelist[0] = params[0].c_str();
1154                                 modelist[1] = to_keep.c_str();
1155
1156                                 if (params_to_keep.size() > 2)
1157                                 {
1158                                         for (q = 2; (q < params_to_keep.size()) && (q < 64); q++)
1159                                         {
1160                                                 log(DEBUG,"Item %d of %d", q, params_to_keep.size());
1161                                                 modelist[n++] = params_to_keep[q].c_str();
1162                                         }
1163                                 }
1164
1165                                 if (smode)
1166                                 {
1167                                         log(DEBUG,"Send mode");
1168                                         Srv->SendMode(modelist, n+2, who);
1169                                 }
1170                                 else
1171                                 {
1172                                         log(DEBUG,"Send mode client");
1173                                         Srv->CallCommandHandler("MODE", modelist, n+2, who);
1174                                 }
1175
1176                                 /* HOT POTATO! PASS IT ON! */
1177                                 DoOneToAllButSender(source,"FMODE",params,sourceserv);
1178                         }
1179                 }
1180                 else
1181                 /* U-lined servers always win regardless of their TS */
1182                 if ((TS > ourTS) && (!Srv->IsUlined(source)))
1183                 {
1184                         /* Bounce the mode back to its sender.* We use our lower TS, so the other end
1185                          * SHOULD accept it, if its clock is right.
1186                          *
1187                          * NOTE: We should check that we arent bouncing anything thats already set at this end.
1188                          * If we are, bounce +ourmode to 'reinforce' it. This prevents desyncs.
1189                          * e.g. They send +l 50, we have +l 10 set. rather than bounce -l 50, we bounce +l 10.
1190                          *
1191                          * Thanks to jilles for pointing out this one-hell-of-an-issue before i even finished
1192                          * writing the code. It took me a while to come up with this solution.
1193                          *
1194                          * XXX: BE SURE YOU UNDERSTAND THIS CODE FULLY BEFORE YOU MESS WITH IT.
1195                          */
1196
1197                         std::deque<std::string> newparams;      /* New parameter list we send back */
1198                         newparams.push_back(params[0]);         /* Target, user or channel */
1199                         newparams.push_back(ConvToStr(ourTS));  /* Timestamp value of the target */
1200                         newparams.push_back("");                /* This contains the mode string. For now
1201                                                                  * it's empty, we fill it below.
1202                                                                  */
1203
1204                         /* Intelligent mode bouncing. Don't just invert, reinforce any modes which are already
1205                          * set to avoid a desync here.
1206                          */
1207                         std::string modebounce = "";
1208                         bool adding = true;
1209                         unsigned int t = 3;
1210                         ModeHandler* mh = NULL;
1211                         char cur_change = 1;
1212                         char old_change = 0;
1213                         for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
1214                         {
1215                                 /* Iterate over all mode chars in the sent set */
1216                                 switch (*x)
1217                                 {
1218                                         /* Adding or subtracting modes? */
1219                                         case '-':
1220                                                 adding = false;
1221                                         break;
1222                                         case '+':
1223                                                 adding = true;
1224                                         break;
1225                                         default:
1226                                                 /* Find the mode handler for this mode */
1227                                                 mh = ServerInstance->ModeGrok->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1228
1229                                                 /* Got a mode handler?
1230                                                  * This also prevents us bouncing modes we have no handler for.
1231                                                  */
1232                                                 if (mh)
1233                                                 {
1234                                                         ModePair ret;
1235                                                         std::string p = "";
1236
1237                                                         /* Does the mode require a parameter right now?
1238                                                          * If it does, fetch it if we can
1239                                                          */
1240                                                         if ((mh->GetNumParams(adding) > 0) && (t < params.size()))
1241                                                                 p = params[t++];
1242
1243                                                         /* Call the ModeSet method to determine if its set with the
1244                                                          * given parameter here or not.
1245                                                          */
1246                                                         ret = mh->ModeSet(smode ? NULL : who, dst, chan, p);
1247
1248                                                         /* XXX: Really. Dont ask.
1249                                                          * Determine from if its set combined with what the current
1250                                                          * 'state' is (adding or not) as to wether we should 'invert'
1251                                                          * or 'reinforce' the mode change
1252                                                          */
1253                                                         (!ret.first ? (adding ? cur_change = '-' : cur_change = '+') : (!adding ? cur_change = '-' : cur_change = '+'));
1254
1255                                                         /* Quickly determine if we have 'flipped' from + to -,
1256                                                          * or - to +, to prevent unneccessary +/- chars in the
1257                                                          * output string that waste bandwidth
1258                                                          */
1259                                                         if (cur_change != old_change)
1260                                                                 modebounce += cur_change;
1261                                                         old_change = cur_change;
1262
1263                                                         /* Add the mode character to the output string */
1264                                                         modebounce += mh->GetModeChar();
1265
1266                                                         /* We got a parameter back from ModeHandler::ModeSet,
1267                                                          * are we supposed to be sending one out right now?
1268                                                          */
1269                                                         if (ret.second.length())
1270                                                         {
1271                                                                 if (mh->GetNumParams(cur_change == '+') > 0)
1272                                                                         /* Yes we're supposed to be sending out
1273                                                                          * the parameter. Make sure it goes
1274                                                                          */
1275                                                                         newparams.push_back(ret.second);
1276                                                         }
1277
1278                                                 }
1279                                         break;
1280                                 }
1281                         }
1282
1283                         /* Update the parameters for FMODE with the new 'bounced' string */
1284                         newparams[2] = modebounce;
1285                         /* Only send it back the way it came, no need to send it anywhere else */
1286                         DoOneToOne(Srv->GetServerName(),"FMODE",newparams,sourceserv);
1287                         log(DEBUG,"FMODE bounced intelligently, our TS less than theirs and the other server is NOT a uline.");
1288                 }
1289                 else
1290                 {
1291                         log(DEBUG,"Allow modes, TS lower for sender");
1292                         /* The server was ulined, but something iffy is up with the TS.
1293                          * Sound the alarm bells!
1294                          */
1295                         if ((Srv->IsUlined(sourceserv)) && (TS > ourTS))
1296                         {
1297                                 WriteOpers("\2WARNING!\2 U-Lined server '%s' has bad TS for '%s' (accepted change): \2SYNC YOUR CLOCKS\2 to avoid this notice",sourceserv.c_str(),params[0].c_str());
1298                         }
1299                         /* Allow the mode, route it to either server or user command handling */
1300                         if (smode)
1301                                 Srv->SendMode(modelist,n,who);
1302                         else
1303                                 Srv->CallCommandHandler("MODE", modelist, n, who);
1304
1305                         /* HOT POTATO! PASS IT ON! */
1306                         DoOneToAllButSender(source,"FMODE",params,sourceserv);
1307                 }
1308                 /* Are we supposed to free the userrec? */
1309                 if (smode)
1310                         DELETE(who);
1311
1312                 return true;
1313         }
1314
1315         /* FTOPIC command */
1316         bool ForceTopic(std::string source, std::deque<std::string> &params)
1317         {
1318                 if (params.size() != 4)
1319                         return true;
1320                 time_t ts = atoi(params[1].c_str());
1321                 std::string nsource = source;
1322
1323                 chanrec* c = Srv->FindChannel(params[0]);
1324                 if (c)
1325                 {
1326                         if ((ts >= c->topicset) || (!*c->topic))
1327                         {
1328                                 std::string oldtopic = c->topic;
1329                                 strlcpy(c->topic,params[3].c_str(),MAXTOPIC);
1330                                 strlcpy(c->setby,params[2].c_str(),NICKMAX-1);
1331                                 c->topicset = ts;
1332                                 /* if the topic text is the same as the current topic,
1333                                  * dont bother to send the TOPIC command out, just silently
1334                                  * update the set time and set nick.
1335                                  */
1336                                 if (oldtopic != params[3])
1337                                 {
1338                                         userrec* user = Srv->FindNick(source);
1339                                         if (!user)
1340                                         {
1341                                                 WriteChannelWithServ(source.c_str(), c, "TOPIC %s :%s", c->name, c->topic);
1342                                         }
1343                                         else
1344                                         {
1345                                                 WriteChannel(c, user, "TOPIC %s :%s", c->name, c->topic);
1346                                                 nsource = user->server;
1347                                         }
1348                                         /* all done, send it on its way */
1349                                         params[3] = ":" + params[3];
1350                                         DoOneToAllButSender(source,"FTOPIC",params,nsource);
1351                                 }
1352                         }
1353
1354                 }
1355
1356                 return true;
1357         }
1358
1359         /* FJOIN, similar to unreal SJOIN */
1360         bool ForceJoin(std::string source, std::deque<std::string> &params)
1361         {
1362                 if (params.size() < 3)
1363                         return true;
1364
1365                 char first[MAXBUF];
1366                 char modestring[MAXBUF];
1367                 char* mode_users[127];
1368                 memset(&mode_users,0,sizeof(mode_users));
1369                 mode_users[0] = first;
1370                 mode_users[1] = modestring;
1371                 strcpy(first,"+");
1372                 unsigned int modectr = 2;
1373
1374                 userrec* who = NULL;
1375                 std::string channel = params[0];
1376                 time_t TS = atoi(params[1].c_str());
1377                 char* key = "";
1378
1379                 chanrec* chan = Srv->FindChannel(channel);
1380                 if (chan)
1381                 {
1382                         key = chan->key;
1383                 }
1384                 strlcpy(mode_users[0],channel.c_str(),MAXBUF);
1385
1386                 /* default is a high value, which if we dont have this
1387                  * channel will let the other side apply their modes.
1388                  */
1389                 time_t ourTS = time(NULL)+600;
1390                 chanrec* us = Srv->FindChannel(channel);
1391                 if (us)
1392                 {
1393                         ourTS = us->age;
1394                 }
1395
1396                 log(DEBUG,"FJOIN detected, our TS=%lu, their TS=%lu",ourTS,TS);
1397
1398                 /* do this first, so our mode reversals are correctly received by other servers
1399                  * if there is a TS collision.
1400                  */
1401                 DoOneToAllButSender(source,"FJOIN",params,source);
1402
1403                 for (unsigned int usernum = 2; usernum < params.size(); usernum++)
1404                 {
1405                         /* process one channel at a time, applying modes. */
1406                         char* usr = (char*)params[usernum].c_str();
1407                         /* Safety check just to make sure someones not sent us an FJOIN full of spaces
1408                          * (is this even possible?) */
1409                         if (usr && *usr)
1410                         {
1411                                 char permissions = *usr;
1412                                 switch (permissions)
1413                                 {
1414                                         case '@':
1415                                                 usr++;
1416                                                 mode_users[modectr++] = usr;
1417                                                 strlcat(modestring,"o",MAXBUF);
1418                                         break;
1419                                         case '%':
1420                                                 usr++;
1421                                                 mode_users[modectr++] = usr;
1422                                                 strlcat(modestring,"h",MAXBUF);
1423                                         break;
1424                                         case '+':
1425                                                 usr++;
1426                                                 mode_users[modectr++] = usr;
1427                                                 strlcat(modestring,"v",MAXBUF);
1428                                         break;
1429                                 }
1430                                 who = Srv->FindNick(usr);
1431                                 if (who)
1432                                 {
1433                                         Srv->JoinUserToChannel(who,channel,key);
1434                                         if (modectr >= (MAXMODES-1))
1435                                         {
1436                                                 /* theres a mode for this user. push them onto the mode queue, and flush it
1437                                                  * if there are more than MAXMODES to go.
1438                                                  */
1439                                                 if ((ourTS >= TS) || (Srv->IsUlined(who->server)))
1440                                                 {
1441                                                         /* We also always let u-lined clients win, no matter what the TS value */
1442                                                         log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1443                                                         Srv->SendMode((const char**)mode_users,modectr,who);
1444                                                         if (ourTS != TS)
1445                                                         {
1446                                                                 log(DEFAULT,"Channel TS for %s changed from %lu to %lu",us->name,ourTS,TS);
1447                                                                 us->age = TS;
1448                                                         }
1449                                                 }
1450                                                 else
1451                                                 {
1452                                                         log(DEBUG,"Their channel newer than ours, bouncing their modes");
1453                                                         /* bouncy bouncy! */
1454                                                         std::deque<std::string> params;
1455                                                         /* modes are now being UNSET... */
1456                                                         *mode_users[1] = '-';
1457                                                         for (unsigned int x = 0; x < modectr; x++)
1458                                                         {
1459                                                                 if (x == 1)
1460                                                                 {
1461                                                                         params.push_back(ConvToStr(us->age));
1462                                                                 }
1463                                                                 params.push_back(mode_users[x]);
1464                                                         }
1465                                                         // tell everyone to bounce the modes. bad modes, bad!
1466                                                         DoOneToMany(Srv->GetServerName(),"FMODE",params);
1467                                                 }
1468                                                 strcpy(mode_users[1],"+");
1469                                                 modectr = 2;
1470                                         }
1471                                 }
1472                         }
1473                 }
1474                 /* there werent enough modes built up to flush it during FJOIN,
1475                  * or, there are a number left over. flush them out.
1476                  */
1477                 if ((modectr > 2) && (who))
1478                 {
1479                         if (ourTS >= TS)
1480                         {
1481                                 log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1482                                 Srv->SendMode((const char**)mode_users,modectr,who);
1483                                 if (ourTS != TS)
1484                                 {
1485                                         log(DEFAULT,"Channel TS for %s changed from %lu to %lu",us->name,ourTS,TS);
1486                                         us->age = TS;
1487                                 }
1488                         }
1489                         else
1490                         {
1491                                 log(DEBUG,"Their channel newer than ours, bouncing their modes");
1492                                 std::deque<std::string> params;
1493                                 *mode_users[1] = '-';
1494                                 for (unsigned int x = 0; x < modectr; x++)
1495                                 {
1496                                         if (x == 1)
1497                                         {
1498                                                 params.push_back(ConvToStr(us->age));
1499                                         }
1500                                         params.push_back(mode_users[x]);
1501                                 }
1502                                 DoOneToMany(Srv->GetServerName(),"FMODE",params);
1503                         }
1504                 }
1505                 return true;
1506         }
1507
1508         bool SyncChannelTS(std::string source, std::deque<std::string> &params)
1509         {
1510                 if (params.size() >= 2)
1511                 {
1512                         chanrec* c = Srv->FindChannel(params[0]);
1513                         if (c)
1514                         {
1515                                 time_t theirTS = atoi(params[1].c_str());
1516                                 time_t ourTS = c->age;
1517                                 if (ourTS >= theirTS)
1518                                 {
1519                                         log(DEBUG,"Updating timestamp for %s, our timestamp was %lu and theirs is %lu",c->name,ourTS,theirTS);
1520                                         c->age = theirTS;
1521                                 }
1522                         }
1523                 }
1524                 DoOneToAllButSender(Srv->GetServerName(),"SYNCTS",params,source);
1525                 return true;
1526         }
1527
1528         /* NICK command */
1529         bool IntroduceClient(std::string source, std::deque<std::string> &params)
1530         {
1531                 if (params.size() < 8)
1532                         return true;
1533                 if (params.size() > 8)
1534                 {
1535                         this->WriteLine(":"+Srv->GetServerName()+" KILL "+params[1]+" :Invalid client introduction ("+params[1]+"?)");
1536                         return true;
1537                 }
1538                 // NICK age nick host dhost ident +modes ip :gecos
1539                 //       0    1   2     3     4      5   6     7
1540                 time_t age = atoi(params[0].c_str());
1541
1542                 /* This used to have a pretty craq'y loop doing the same thing,
1543                  * now we just let the STL do the hard work (more efficiently)
1544                  */
1545                 params[5] = params[5].substr(params[5].find_first_not_of('+'));
1546
1547                 const char* tempnick = params[1].c_str();
1548                 log(DEBUG,"Introduce client %s!%s@%s",tempnick,params[4].c_str(),params[2].c_str());
1549
1550                 user_hash::iterator iter = clientlist.find(tempnick);
1551
1552                 if (iter != clientlist.end())
1553                 {
1554                         // nick collision
1555                         log(DEBUG,"Nick collision on %s!%s@%s: %lu %lu",tempnick,params[4].c_str(),params[2].c_str(),(unsigned long)age,(unsigned long)iter->second->age);
1556                         this->WriteLine(":"+Srv->GetServerName()+" KILL "+tempnick+" :Nickname collision");
1557                         return true;
1558                 }
1559
1560                 clientlist[tempnick] = new userrec();
1561                 clientlist[tempnick]->fd = FD_MAGIC_NUMBER;
1562                 strlcpy(clientlist[tempnick]->nick, tempnick,NICKMAX-1);
1563                 strlcpy(clientlist[tempnick]->host, params[2].c_str(),63);
1564                 strlcpy(clientlist[tempnick]->dhost, params[3].c_str(),63);
1565                 clientlist[tempnick]->server = FindServerNamePtr(source.c_str());
1566                 strlcpy(clientlist[tempnick]->ident, params[4].c_str(),IDENTMAX);
1567                 strlcpy(clientlist[tempnick]->fullname, params[7].c_str(),MAXGECOS);
1568                 clientlist[tempnick]->registered = REG_ALL;
1569                 clientlist[tempnick]->signon = age;
1570
1571                 for (std::string::iterator v = params[5].begin(); v != params[5].end(); v++)
1572                 {
1573                         clientlist[tempnick]->modes[(*v)-65] = 1;
1574                 }
1575
1576                 if (params[6].find_first_of(":") != std::string::npos)
1577                         clientlist[tempnick]->SetSockAddr(AF_INET6, params[6].c_str(), 0);
1578                 else
1579                         clientlist[tempnick]->SetSockAddr(AF_INET, params[6].c_str(), 0);
1580
1581                 WriteOpers("*** Client connecting at %s: %s!%s@%s [%s]",clientlist[tempnick]->server,clientlist[tempnick]->nick,clientlist[tempnick]->ident,clientlist[tempnick]->host, clientlist[tempnick]->GetIPString());
1582
1583                 params[7] = ":" + params[7];
1584                 DoOneToAllButSender(source,"NICK",params,source);
1585
1586                 // Increment the Source Servers User Count..
1587                 TreeServer* SourceServer = FindServer(source);
1588                 if (SourceServer)
1589                 {
1590                         log(DEBUG,"Found source server of %s",clientlist[tempnick]->nick);
1591                         SourceServer->AddUserCount();
1592                 }
1593
1594                 return true;
1595         }
1596
1597         /* Send one or more FJOINs for a channel of users.
1598          * If the length of a single line is more than 480-NICKMAX
1599          * in length, it is split over multiple lines.
1600          */
1601         void SendFJoins(TreeServer* Current, chanrec* c)
1602         {
1603                 log(DEBUG,"Sending FJOINs to other server for %s",c->name);
1604                 char list[MAXBUF];
1605                 std::string individual_halfops = ":"+Srv->GetServerName()+" FMODE "+c->name+" "+ConvToStr(c->age);
1606
1607                 size_t dlen, curlen;
1608                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",Srv->GetServerName().c_str(),c->name,(unsigned long)c->age);
1609                 int numusers = 0;
1610                 char* ptr = list + dlen;
1611
1612                 CUList *ulist = c->GetUsers();
1613                 std::vector<userrec*> specific_halfop;
1614                 std::vector<userrec*> specific_voice;
1615                 std::string modes = "";
1616                 std::string params = "";
1617
1618                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1619                 {
1620                         int x = cflags(i->second,c);
1621                         if ((x & UCMODE_HOP) && (x & UCMODE_OP))
1622                         {
1623                                 specific_halfop.push_back(i->second);
1624                         }
1625                         if (((x & UCMODE_HOP) || (x & UCMODE_OP)) && (x & UCMODE_VOICE))
1626                         {
1627                                 specific_voice.push_back(i->second);
1628                         }
1629
1630                         const char* n = "";
1631                         if (x & UCMODE_OP)
1632                         {
1633                                 n = "@";
1634                         }
1635                         else if (x & UCMODE_HOP)
1636                         {
1637                                 n = "%";
1638                         }
1639                         else if (x & UCMODE_VOICE)
1640                         {
1641                                 n = "+";
1642                         }
1643
1644                         size_t ptrlen = snprintf(ptr, MAXBUF, " %s%s", n, i->second->nick);
1645
1646                         curlen += ptrlen;
1647                         ptr += ptrlen;
1648
1649                         numusers++;
1650
1651                         if (curlen > (480-NICKMAX))
1652                         {
1653                                 this->WriteLine(list);
1654                                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",Srv->GetServerName().c_str(),c->name,(unsigned long)c->age);
1655                                 ptr = list + dlen;
1656                                 ptrlen = 0;
1657                                 numusers = 0;
1658                                 for (unsigned int y = 0; y < specific_voice.size(); y++)
1659                                 {
1660                                         modes.append("v");
1661                                         params.append(specific_voice[y]->nick).append(" ");
1662                                         //this->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" "+ConvToStr(c->age)+" +v "+specific_voice[y]->nick);
1663                                 }
1664                                 for (unsigned int y = 0; y < specific_halfop.size(); y++)
1665                                 {
1666                                         modes.append("h");
1667                                         params.append(specific_halfop[y]->nick).append(" ");
1668                                         //this->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" "+ConvToStr(c->age)+" +h "+specific_halfop[y]->nick);
1669                                 }
1670                         }
1671                 }
1672                 if (numusers)
1673                 {
1674                         this->WriteLine(list);
1675                         for (unsigned int y = 0; y < specific_voice.size(); y++)
1676                         {
1677                                 modes.append("v");
1678                                 params.append(specific_voice[y]->nick).append(" ");
1679                                 //this->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" "+ConvToStr(c->age)+" +v "+specific_voice[y]->nick);
1680                         }
1681                         for (unsigned int y = 0; y < specific_halfop.size(); y++)
1682                         {
1683                                 modes.append("h");
1684                                 params.append(specific_halfop[y]->nick).append(" ");
1685                                 //this->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" "+ConvToStr(c->age)+" +h "+specific_halfop[y]->nick);
1686                         }
1687                 }
1688                 //std::string modes = "";
1689                 //std::string params = "";
1690                 for (BanList::iterator b = c->bans.begin(); b != c->bans.end(); b++)
1691                 {
1692                         modes.append("b");
1693                         params.append(b->data).append(" ");
1694                 }
1695                 /* XXX: Send each channel mode and its params -- we'll need a method for this in ModeHandler? */
1696                 //FOREACH_MOD(I_OnSyncChannel,OnSyncChannel(c->second,(Module*)TreeProtocolModule,(void*)this));
1697                 this->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" "+ConvToStr(c->age)+" +"+chanmodes(c,true)+modes+" "+params);
1698         }
1699
1700         /* Send G, Q, Z and E lines */
1701         void SendXLines(TreeServer* Current)
1702         {
1703                 char data[MAXBUF];
1704                 std::string n = Srv->GetServerName();
1705                 const char* sn = n.c_str();
1706                 int iterations = 0;
1707                 /* Yes, these arent too nice looking, but they get the job done */
1708                 for (std::vector<ZLine>::iterator i = zlines.begin(); i != zlines.end(); i++, iterations++)
1709                 {
1710                         snprintf(data,MAXBUF,":%s ADDLINE Z %s %s %lu %lu :%s",sn,i->ipaddr,i->source,(unsigned long)i->set_time,(unsigned long)i->duration,i->reason);
1711                         this->WriteLine(data);
1712                 }
1713                 for (std::vector<QLine>::iterator i = qlines.begin(); i != qlines.end(); i++, iterations++)
1714                 {
1715                         snprintf(data,MAXBUF,":%s ADDLINE Q %s %s %lu %lu :%s",sn,i->nick,i->source,(unsigned long)i->set_time,(unsigned long)i->duration,i->reason);
1716                         this->WriteLine(data);
1717                 }
1718                 for (std::vector<GLine>::iterator i = glines.begin(); i != glines.end(); i++, iterations++)
1719                 {
1720                         snprintf(data,MAXBUF,":%s ADDLINE G %s %s %lu %lu :%s",sn,i->hostmask,i->source,(unsigned long)i->set_time,(unsigned long)i->duration,i->reason);
1721                         this->WriteLine(data);
1722                 }
1723                 for (std::vector<ELine>::iterator i = elines.begin(); i != elines.end(); i++, iterations++)
1724                 {
1725                         snprintf(data,MAXBUF,":%s ADDLINE E %s %s %lu %lu :%s",sn,i->hostmask,i->source,(unsigned long)i->set_time,(unsigned long)i->duration,i->reason);
1726                         this->WriteLine(data);
1727                 }
1728                 for (std::vector<ZLine>::iterator i = pzlines.begin(); i != pzlines.end(); i++, iterations++)
1729                 {
1730                         snprintf(data,MAXBUF,":%s ADDLINE Z %s %s %lu %lu :%s",sn,i->ipaddr,i->source,(unsigned long)i->set_time,(unsigned long)i->duration,i->reason);
1731                         this->WriteLine(data);
1732                 }
1733                 for (std::vector<QLine>::iterator i = pqlines.begin(); i != pqlines.end(); i++, iterations++)
1734                 {
1735                         snprintf(data,MAXBUF,":%s ADDLINE Q %s %s %lu %lu :%s",sn,i->nick,i->source,(unsigned long)i->set_time,(unsigned long)i->duration,i->reason);
1736                         this->WriteLine(data);
1737                 }
1738                 for (std::vector<GLine>::iterator i = pglines.begin(); i != pglines.end(); i++, iterations++)
1739                 {
1740                         snprintf(data,MAXBUF,":%s ADDLINE G %s %s %lu %lu :%s",sn,i->hostmask,i->source,(unsigned long)i->set_time,(unsigned long)i->duration,i->reason);
1741                         this->WriteLine(data);
1742                 }
1743                 for (std::vector<ELine>::iterator i = pelines.begin(); i != pelines.end(); i++, iterations++)
1744                 {
1745                         snprintf(data,MAXBUF,":%s ADDLINE E %s %s %lu %lu :%s",sn,i->hostmask,i->source,(unsigned long)i->set_time,(unsigned long)i->duration,i->reason);
1746                         this->WriteLine(data);
1747                 }
1748         }
1749
1750         /* Send channel modes and topics */
1751         void SendChannelModes(TreeServer* Current)
1752         {
1753                 char data[MAXBUF];
1754                 std::deque<std::string> list;
1755                 int iterations = 0;
1756                 std::string n = Srv->GetServerName();
1757                 const char* sn = n.c_str();
1758                 for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++, iterations++)
1759                 {
1760                         SendFJoins(Current, c->second);
1761                         if (*c->second->topic)
1762                         {
1763                                 snprintf(data,MAXBUF,":%s FTOPIC %s %lu %s :%s",sn,c->second->name,(unsigned long)c->second->topicset,c->second->setby,c->second->topic);
1764                                 this->WriteLine(data);
1765                         }
1766                         FOREACH_MOD(I_OnSyncChannel,OnSyncChannel(c->second,(Module*)TreeProtocolModule,(void*)this));
1767                         list.clear();
1768                         c->second->GetExtList(list);
1769                         for (unsigned int j = 0; j < list.size(); j++)
1770                         {
1771                                 FOREACH_MOD(I_OnSyncChannelMetaData,OnSyncChannelMetaData(c->second,(Module*)TreeProtocolModule,(void*)this,list[j]));
1772                         }
1773                 }
1774         }
1775
1776         /* send all users and their oper state/modes */
1777         void SendUsers(TreeServer* Current)
1778         {
1779                 char data[MAXBUF];
1780                 std::deque<std::string> list;
1781                 int iterations = 0;
1782                 for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++, iterations++)
1783                 {
1784                         if (u->second->registered == REG_ALL)
1785                         {
1786                                 snprintf(data,MAXBUF,":%s NICK %lu %s %s %s %s +%s %s :%s",u->second->server,(unsigned long)u->second->age,u->second->nick,u->second->host,u->second->dhost,u->second->ident,u->second->FormatModes(),u->second->GetIPString(),u->second->fullname);
1787                                 this->WriteLine(data);
1788                                 if (*u->second->oper)
1789                                 {
1790                                         this->WriteLine(":"+std::string(u->second->nick)+" OPERTYPE "+std::string(u->second->oper));
1791                                 }
1792                                 if (*u->second->awaymsg)
1793                                 {
1794                                         this->WriteLine(":"+std::string(u->second->nick)+" AWAY :"+std::string(u->second->awaymsg));
1795                                 }
1796                                 FOREACH_MOD(I_OnSyncUser,OnSyncUser(u->second,(Module*)TreeProtocolModule,(void*)this));
1797                                 list.clear();
1798                                 u->second->GetExtList(list);
1799                                 for (unsigned int j = 0; j < list.size(); j++)
1800                                 {
1801                                         FOREACH_MOD(I_OnSyncUserMetaData,OnSyncUserMetaData(u->second,(Module*)TreeProtocolModule,(void*)this,list[j]));
1802                                 }
1803                         }
1804                 }
1805         }
1806
1807         /* This function is called when we want to send a netburst to a local
1808          * server. There is a set order we must do this, because for example
1809          * users require their servers to exist, and channels require their
1810          * users to exist. You get the idea.
1811          */
1812         void DoBurst(TreeServer* s)
1813         {
1814                 /* The calls here to ServerInstance-> yield the processing
1815                  * back to the core so that a large burst is split into at least 6 sections
1816                  * (possibly more)
1817                  */
1818                 std::string burst = "BURST "+ConvToStr(time(NULL));
1819                 std::string endburst = "ENDBURST";
1820                 // Because by the end of the netburst, it  could be gone!
1821                 std::string name = s->GetName();
1822                 Srv->SendOpers("*** Bursting to \2"+name+"\2.");
1823                 this->WriteLine(burst);
1824                 /* send our version string */
1825                 this->WriteLine(":"+Srv->GetServerName()+" VERSION :"+Srv->GetVersion());
1826                 /* Send server tree */
1827                 this->SendServers(TreeRoot,s,1);
1828                 /* Send users and their oper status */
1829                 this->SendUsers(s);
1830                 /* Send everything else (channel modes, xlines etc) */
1831                 this->SendChannelModes(s);
1832                 this->SendXLines(s);
1833                 FOREACH_MOD(I_OnSyncOtherMetaData,OnSyncOtherMetaData((Module*)TreeProtocolModule,(void*)this));
1834                 this->WriteLine(endburst);
1835                 Srv->SendOpers("*** Finished bursting to \2"+name+"\2.");
1836         }
1837
1838         /* This function is called when we receive data from a remote
1839          * server. We buffer the data in a std::string (it doesnt stay
1840          * there for long), reading using InspSocket::Read() which can
1841          * read up to 16 kilobytes in one operation.
1842          *
1843          * IF THIS FUNCTION RETURNS FALSE, THE CORE CLOSES AND DELETES
1844          * THE SOCKET OBJECT FOR US.
1845          */
1846         virtual bool OnDataReady()
1847         {
1848                 char* data = this->Read();
1849                 /* Check that the data read is a valid pointer and it has some content */
1850                 if (data && *data)
1851                 {
1852                         this->in_buffer.append(data);
1853                         /* While there is at least one new line in the buffer,
1854                          * do something useful (we hope!) with it.
1855                          */
1856                         while (in_buffer.find("\n") != std::string::npos)
1857                         {
1858                                 std::string ret = in_buffer.substr(0,in_buffer.find("\n")-1);
1859                                 in_buffer = in_buffer.substr(in_buffer.find("\n")+1,in_buffer.length()-in_buffer.find("\n"));
1860                                 if (ret.find("\r") != std::string::npos)
1861                                         ret = in_buffer.substr(0,in_buffer.find("\r")-1);
1862                                 /* Process this one, abort if it
1863                                  * didnt return true.
1864                                  */
1865                                 if (this->ctx_in)
1866                                 {
1867                                         char out[1024];
1868                                         char result[1024];
1869                                         memset(result,0,1024);
1870                                         memset(out,0,1024);
1871                                         log(DEBUG,"Original string '%s'",ret.c_str());
1872                                         /* ERROR + CAPAB is still allowed unencryped */
1873                                         if ((ret.substr(0,7) != "ERROR :") && (ret.substr(0,6) != "CAPAB "))
1874                                         {
1875                                                 int nbytes = from64tobits(out, ret.c_str(), 1024);
1876                                                 if ((nbytes > 0) && (nbytes < 1024))
1877                                                 {
1878                                                         log(DEBUG,"m_spanningtree: decrypt %d bytes",nbytes);
1879                                                         ctx_in->Decrypt(out, result, nbytes, 0);
1880                                                         for (int t = 0; t < nbytes; t++)
1881                                                                 if (result[t] == '\7') result[t] = 0;
1882                                                         ret = result;
1883                                                 }
1884                                         }
1885                                 }
1886                                 if (!this->ProcessLine(ret))
1887                                 {
1888                                         log(DEBUG,"ProcessLine says no!");
1889                                         return false;
1890                                 }
1891                         }
1892                         return true;
1893                 }
1894                 /* EAGAIN returns an empty but non-NULL string, so this
1895                  * evaluates to TRUE for EAGAIN but to FALSE for EOF.
1896                  */
1897                 return (data && !*data);
1898         }
1899
1900         int WriteLine(std::string line)
1901         {
1902                 log(DEBUG,"OUT: %s",line.c_str());
1903                 if (this->ctx_out)
1904                 {
1905                         char result[10240];
1906                         char result64[10240];
1907                         if (this->keylength)
1908                         {
1909                                 // pad it to the key length
1910                                 int n = this->keylength - (line.length() % this->keylength);
1911                                 if (n)
1912                                 {
1913                                         log(DEBUG,"Append %d chars to line to make it %d long from %d, key length %d",n,n+line.length(),line.length(),this->keylength);
1914                                         line.append(n,'\7');
1915                                 }
1916                         }
1917                         unsigned int ll = line.length();
1918                         ctx_out->Encrypt(line.c_str(), result, ll, 0);
1919                         to64frombits((unsigned char*)result64,(unsigned char*)result,ll);
1920                         line = result64;
1921                         //int from64tobits(char *out, const char *in, int maxlen);
1922                 }
1923                 return this->Write(line + "\r\n");
1924         }
1925
1926         /* Handle ERROR command */
1927         bool Error(std::deque<std::string> &params)
1928         {
1929                 if (params.size() < 1)
1930                         return false;
1931                 WriteOpers("*** ERROR from %s: %s",(InboundServerName != "" ? InboundServerName.c_str() : myhost.c_str()),params[0].c_str());
1932                 /* we will return false to cause the socket to close. */
1933                 return false;
1934         }
1935
1936         bool Stats(std::string prefix, std::deque<std::string> &params)
1937         {
1938                 /* Get the reply to a STATS query if it matches this servername,
1939                  * and send it back as a load of PUSH queries
1940                  */
1941                 if (params.size() > 1)
1942                 {
1943                         if (Srv->MatchText(Srv->GetServerName(), params[1]))
1944                         {
1945                                 /* It's for our server */
1946                                 string_list results;
1947                                 userrec* source = Srv->FindNick(prefix);
1948                                 if (source)
1949                                 {
1950                                         std::deque<std::string> par;
1951                                         par.push_back(prefix);
1952                                         par.push_back("");
1953                                         DoStats(*(params[0].c_str()), source, results);
1954                                         for (size_t i = 0; i < results.size(); i++)
1955                                         {
1956                                                 par[1] = "::" + results[i];
1957                                                 DoOneToOne(Srv->GetServerName(), "PUSH",par, source->server);
1958                                         }
1959                                 }
1960                         }
1961                         else
1962                         {
1963                                 /* Pass it on */
1964                                 userrec* source = Srv->FindNick(prefix);
1965                                 if (source)
1966                                         DoOneToOne(prefix, "STATS", params, params[1]);
1967                         }
1968                 }
1969                 return true;
1970         }
1971
1972
1973         /* Because the core won't let users or even SERVERS set +o,
1974          * we use the OPERTYPE command to do this.
1975          */
1976         bool OperType(std::string prefix, std::deque<std::string> &params)
1977         {
1978                 if (params.size() != 1)
1979                 {
1980                         log(DEBUG,"Received invalid oper type from %s",prefix.c_str());
1981                         return true;
1982                 }
1983                 std::string opertype = params[0];
1984                 userrec* u = Srv->FindNick(prefix);
1985                 if (u)
1986                 {
1987                         u->modes[UM_OPERATOR] = 1;
1988                         strlcpy(u->oper,opertype.c_str(),NICKMAX-1);
1989                         DoOneToAllButSender(u->nick,"OPERTYPE",params,u->server);
1990                 }
1991                 return true;
1992         }
1993
1994         /* Because Andy insists that services-compatible servers must
1995          * implement SVSNICK and SVSJOIN, that's exactly what we do :p
1996          */
1997         bool ForceNick(std::string prefix, std::deque<std::string> &params)
1998         {
1999                 if (params.size() < 3)
2000                         return true;
2001
2002                 userrec* u = Srv->FindNick(params[0]);
2003
2004                 if (u)
2005                 {
2006                         DoOneToAllButSender(prefix,"SVSNICK",params,prefix);
2007                         if (IS_LOCAL(u))
2008                         {
2009                                 std::deque<std::string> par;
2010                                 par.push_back(params[1]);
2011                                 /* This is not required as one is sent in OnUserPostNick below
2012                                  */
2013                                 //DoOneToMany(u->nick,"NICK",par);
2014                                 Srv->ChangeUserNick(u,params[1]);
2015                                 u->age = atoi(params[2].c_str());
2016                         }
2017                 }
2018                 return true;
2019         }
2020
2021         bool ServiceJoin(std::string prefix, std::deque<std::string> &params)
2022         {
2023                 if (params.size() < 2)
2024                         return true;
2025
2026                 userrec* u = Srv->FindNick(params[0]);
2027
2028                 if (u)
2029                 {
2030                         Srv->JoinUserToChannel(u,params[1],"");
2031                         DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
2032                 }
2033                 return true;
2034         }
2035
2036         bool RemoteRehash(std::string prefix, std::deque<std::string> &params)
2037         {
2038                 if (params.size() < 1)
2039                         return false;
2040
2041                 std::string servermask = params[0];
2042
2043                 if (Srv->MatchText(Srv->GetServerName(),servermask))
2044                 {
2045                         Srv->SendOpers("*** Remote rehash initiated from server \002"+prefix+"\002.");
2046                         Srv->RehashServer();
2047                         ReadConfiguration(false);
2048                 }
2049                 DoOneToAllButSender(prefix,"REHASH",params,prefix);
2050                 return true;
2051         }
2052
2053         bool RemoteKill(std::string prefix, std::deque<std::string> &params)
2054         {
2055                 if (params.size() != 2)
2056                         return true;
2057
2058                 std::string nick = params[0];
2059                 userrec* u = Srv->FindNick(prefix);
2060                 userrec* who = Srv->FindNick(nick);
2061
2062                 if (who)
2063                 {
2064                         /* Prepend kill source, if we don't have one */
2065                         std::string sourceserv = prefix;
2066                         if (u)
2067                         {
2068                                 sourceserv = u->server;
2069                         }
2070                         if (*(params[1].c_str()) != '[')
2071                         {
2072                                 params[1] = "[" + sourceserv + "] Killed (" + params[1] +")";
2073                         }
2074                         std::string reason = params[1];
2075                         params[1] = ":" + params[1];
2076                         DoOneToAllButSender(prefix,"KILL",params,sourceserv);
2077                         ::Write(who->fd, ":%s KILL %s :%s (%s)", sourceserv.c_str(), who->nick, sourceserv.c_str(), reason.c_str());
2078                         Srv->QuitUser(who,reason);
2079                 }
2080                 return true;
2081         }
2082
2083         bool LocalPong(std::string prefix, std::deque<std::string> &params)
2084         {
2085                 if (params.size() < 1)
2086                         return true;
2087
2088                 if (params.size() == 1)
2089                 {
2090                         TreeServer* ServerSource = FindServer(prefix);
2091                         if (ServerSource)
2092                         {
2093                                 ServerSource->SetPingFlag();
2094                         }
2095                 }
2096                 else
2097                 {
2098                         std::string forwardto = params[1];
2099                         if (forwardto == Srv->GetServerName())
2100                         {
2101                                 /*
2102                                  * this is a PONG for us
2103                                  * if the prefix is a user, check theyre local, and if they are,
2104                                  * dump the PONG reply back to their fd. If its a server, do nowt.
2105                                  * Services might want to send these s->s, but we dont need to yet.
2106                                  */
2107                                 userrec* u = Srv->FindNick(prefix);
2108
2109                                 if (u)
2110                                 {
2111                                         WriteServ(u->fd,"PONG %s %s",params[0].c_str(),params[1].c_str());
2112                                 }
2113                         }
2114                         else
2115                         {
2116                                 // not for us, pass it on :)
2117                                 DoOneToOne(prefix,"PONG",params,forwardto);
2118                         }
2119                 }
2120
2121                 return true;
2122         }
2123
2124         bool MetaData(std::string prefix, std::deque<std::string> &params)
2125         {
2126                 if (params.size() < 3)
2127                         return true;
2128
2129                 TreeServer* ServerSource = FindServer(prefix);
2130
2131                 if (ServerSource)
2132                 {
2133                         if (params[0] == "*")
2134                         {
2135                                 FOREACH_MOD(I_OnDecodeMetaData,OnDecodeMetaData(TYPE_OTHER,NULL,params[1],params[2]));
2136                         }
2137                         else if (*(params[0].c_str()) == '#')
2138                         {
2139                                 chanrec* c = Srv->FindChannel(params[0]);
2140                                 if (c)
2141                                 {
2142                                         FOREACH_MOD(I_OnDecodeMetaData,OnDecodeMetaData(TYPE_CHANNEL,c,params[1],params[2]));
2143                                 }
2144                         }
2145                         else if (*(params[0].c_str()) != '#')
2146                         {
2147                                 userrec* u = Srv->FindNick(params[0]);
2148                                 if (u)
2149                                 {
2150                                         FOREACH_MOD(I_OnDecodeMetaData,OnDecodeMetaData(TYPE_USER,u,params[1],params[2]));
2151                                 }
2152                         }
2153                 }
2154
2155                 params[2] = ":" + params[2];
2156                 DoOneToAllButSender(prefix,"METADATA",params,prefix);
2157                 return true;
2158         }
2159
2160         bool ServerVersion(std::string prefix, std::deque<std::string> &params)
2161         {
2162                 if (params.size() < 1)
2163                         return true;
2164
2165                 TreeServer* ServerSource = FindServer(prefix);
2166
2167                 if (ServerSource)
2168                 {
2169                         ServerSource->SetVersion(params[0]);
2170                 }
2171                 params[0] = ":" + params[0];
2172                 DoOneToAllButSender(prefix,"VERSION",params,prefix);
2173                 return true;
2174         }
2175
2176         bool ChangeHost(std::string prefix, std::deque<std::string> &params)
2177         {
2178                 if (params.size() < 1)
2179                         return true;
2180
2181                 userrec* u = Srv->FindNick(prefix);
2182
2183                 if (u)
2184                 {
2185                         Srv->ChangeHost(u,params[0]);
2186                         DoOneToAllButSender(prefix,"FHOST",params,u->server);
2187                 }
2188                 return true;
2189         }
2190
2191         bool AddLine(std::string prefix, std::deque<std::string> &params)
2192         {
2193                 if (params.size() < 6)
2194                         return true;
2195
2196                 bool propogate = false;
2197
2198                 switch (*(params[0].c_str()))
2199                 {
2200                         case 'Z':
2201                                 propogate = add_zline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2202                                 zline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2203                         break;
2204                         case 'Q':
2205                                 propogate = add_qline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2206                                 qline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2207                         break;
2208                         case 'E':
2209                                 propogate = add_eline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2210                                 eline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2211                         break;
2212                         case 'G':
2213                                 propogate = add_gline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2214                                 gline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2215                         break;
2216                         case 'K':
2217                                 propogate = add_kline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2218                         break;
2219                         default:
2220                                 /* Just in case... */
2221                                 Srv->SendOpers("*** \2WARNING\2: Invalid xline type '"+params[0]+"' sent by server "+prefix+", ignored!");
2222                                 propogate = false;
2223                         break;
2224                 }
2225
2226                 /* Send it on its way */
2227                 if (propogate)
2228                 {
2229                         if (atoi(params[4].c_str()))
2230                         {
2231                                 WriteOpers("*** %s Added %cLINE on %s to expire in %lu seconds (%s).",prefix.c_str(),*(params[0].c_str()),params[1].c_str(),atoi(params[4].c_str()),params[5].c_str());
2232                         }
2233                         else
2234                         {
2235                                 WriteOpers("*** %s Added permenant %cLINE on %s (%s).",prefix.c_str(),*(params[0].c_str()),params[1].c_str(),params[5].c_str());
2236                         }
2237                         params[5] = ":" + params[5];
2238                         DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
2239                 }
2240                 if (!this->bursting)
2241                 {
2242                         log(DEBUG,"Applying lines...");
2243                         apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2244                 }
2245                 return true;
2246         }
2247
2248         bool ChangeName(std::string prefix, std::deque<std::string> &params)
2249         {
2250                 if (params.size() < 1)
2251                         return true;
2252
2253                 userrec* u = Srv->FindNick(prefix);
2254
2255                 if (u)
2256                 {
2257                         Srv->ChangeGECOS(u,params[0]);
2258                         params[0] = ":" + params[0];
2259                         DoOneToAllButSender(prefix,"FNAME",params,u->server);
2260                 }
2261                 return true;
2262         }
2263
2264         bool Whois(std::string prefix, std::deque<std::string> &params)
2265         {
2266                 if (params.size() < 1)
2267                         return true;
2268
2269                 log(DEBUG,"In IDLE command");
2270                 userrec* u = Srv->FindNick(prefix);
2271
2272                 if (u)
2273                 {
2274                         log(DEBUG,"USER EXISTS: %s",u->nick);
2275                         // an incoming request
2276                         if (params.size() == 1)
2277                         {
2278                                 userrec* x = Srv->FindNick(params[0]);
2279                                 if ((x) && (IS_LOCAL(x)))
2280                                 {
2281                                         userrec* x = Srv->FindNick(params[0]);
2282                                         log(DEBUG,"Got IDLE");
2283                                         char signon[MAXBUF];
2284                                         char idle[MAXBUF];
2285                                         log(DEBUG,"Sending back IDLE 3");
2286                                         snprintf(signon,MAXBUF,"%lu",(unsigned long)x->signon);
2287                                         snprintf(idle,MAXBUF,"%lu",(unsigned long)abs((x->idle_lastmsg)-time(NULL)));
2288                                         std::deque<std::string> par;
2289                                         par.push_back(prefix);
2290                                         par.push_back(signon);
2291                                         par.push_back(idle);
2292                                         // ours, we're done, pass it BACK
2293                                         DoOneToOne(params[0],"IDLE",par,u->server);
2294                                 }
2295                                 else
2296                                 {
2297                                         // not ours pass it on
2298                                         DoOneToOne(prefix,"IDLE",params,x->server);
2299                                 }
2300                         }
2301                         else if (params.size() == 3)
2302                         {
2303                                 std::string who_did_the_whois = params[0];
2304                                 userrec* who_to_send_to = Srv->FindNick(who_did_the_whois);
2305                                 if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2306                                 {
2307                                         log(DEBUG,"Got final IDLE");
2308                                         // an incoming reply to a whois we sent out
2309                                         std::string nick_whoised = prefix;
2310                                         unsigned long signon = atoi(params[1].c_str());
2311                                         unsigned long idle = atoi(params[2].c_str());
2312                                         if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2313                                                 do_whois(who_to_send_to,u,signon,idle,nick_whoised.c_str());
2314                                 }
2315                                 else
2316                                 {
2317                                         // not ours, pass it on
2318                                         DoOneToOne(prefix,"IDLE",params,who_to_send_to->server);
2319                                 }
2320                         }
2321                 }
2322                 return true;
2323         }
2324
2325         bool Push(std::string prefix, std::deque<std::string> &params)
2326         {
2327                 if (params.size() < 2)
2328                         return true;
2329
2330                 userrec* u = Srv->FindNick(params[0]);
2331
2332                 if (!u)
2333                         return true;
2334
2335                 if (IS_LOCAL(u))
2336                 {
2337                         ::Write(u->fd,"%s",params[1].c_str());
2338                 }
2339                 else
2340                 {
2341                         // continue the raw onwards
2342                         params[1] = ":" + params[1];
2343                         DoOneToOne(prefix,"PUSH",params,u->server);
2344                 }
2345                 return true;
2346         }
2347
2348         bool Time(std::string prefix, std::deque<std::string> &params)
2349         {
2350                 // :source.server TIME remote.server sendernick
2351                 // :remote.server TIME source.server sendernick TS
2352                 if (params.size() == 2)
2353                 {
2354                         // someone querying our time?
2355                         if (Srv->GetServerName() == params[0])
2356                         {
2357                                 userrec* u = Srv->FindNick(params[1]);
2358                                 if (u)
2359                                 {
2360                                         char curtime[256];
2361                                         snprintf(curtime,256,"%lu",(unsigned long)time(NULL));
2362                                         params.push_back(curtime);
2363                                         params[0] = prefix;
2364                                         DoOneToOne(Srv->GetServerName(),"TIME",params,params[0]);
2365                                 }
2366                         }
2367                         else
2368                         {
2369                                 // not us, pass it on
2370                                 userrec* u = Srv->FindNick(params[1]);
2371                                 if (u)
2372                                         DoOneToOne(prefix,"TIME",params,params[0]);
2373                         }
2374                 }
2375                 else if (params.size() == 3)
2376                 {
2377                         // a response to a previous TIME
2378                         userrec* u = Srv->FindNick(params[1]);
2379                         if ((u) && (IS_LOCAL(u)))
2380                         {
2381                         time_t rawtime = atol(params[2].c_str());
2382                         struct tm * timeinfo;
2383                         timeinfo = localtime(&rawtime);
2384                                 char tms[26];
2385                                 snprintf(tms,26,"%s",asctime(timeinfo));
2386                                 tms[24] = 0;
2387                         WriteServ(u->fd,"391 %s %s :%s",u->nick,prefix.c_str(),tms);
2388                         }
2389                         else
2390                         {
2391                                 if (u)
2392                                         DoOneToOne(prefix,"TIME",params,u->server);
2393                         }
2394                 }
2395                 return true;
2396         }
2397
2398         bool LocalPing(std::string prefix, std::deque<std::string> &params)
2399         {
2400                 if (params.size() < 1)
2401                         return true;
2402
2403                 if (params.size() == 1)
2404                 {
2405                         std::string stufftobounce = params[0];
2406                         this->WriteLine(":"+Srv->GetServerName()+" PONG "+stufftobounce);
2407                         return true;
2408                 }
2409                 else
2410                 {
2411                         std::string forwardto = params[1];
2412                         if (forwardto == Srv->GetServerName())
2413                         {
2414                                 // this is a ping for us, send back PONG to the requesting server
2415                                 params[1] = params[0];
2416                                 params[0] = forwardto;
2417                                 DoOneToOne(forwardto,"PONG",params,params[1]);
2418                         }
2419                         else
2420                         {
2421                                 // not for us, pass it on :)
2422                                 DoOneToOne(prefix,"PING",params,forwardto);
2423                         }
2424                         return true;
2425                 }
2426         }
2427
2428         bool RemoteServer(std::string prefix, std::deque<std::string> &params)
2429         {
2430                 if (params.size() < 4)
2431                         return false;
2432
2433                 std::string servername = params[0];
2434                 std::string password = params[1];
2435                 // hopcount is not used for a remote server, we calculate this ourselves
2436                 std::string description = params[3];
2437                 TreeServer* ParentOfThis = FindServer(prefix);
2438
2439                 if (!ParentOfThis)
2440                 {
2441                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
2442                         return false;
2443                 }
2444                 TreeServer* CheckDupe = FindServer(servername);
2445                 if (CheckDupe)
2446                 {
2447                         this->WriteLine("ERROR :Server "+servername+" already exists!");
2448                         Srv->SendOpers("*** Server connection from \2"+servername+"\2 denied, already exists");
2449                         return false;
2450                 }
2451                 TreeServer* Node = new TreeServer(servername,description,ParentOfThis,NULL);
2452                 ParentOfThis->AddChild(Node);
2453                 params[3] = ":" + params[3];
2454                 DoOneToAllButSender(prefix,"SERVER",params,prefix);
2455                 Srv->SendOpers("*** Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
2456                 return true;
2457         }
2458
2459         bool Outbound_Reply_Server(std::deque<std::string> &params)
2460         {
2461                 if (params.size() < 4)
2462                         return false;
2463
2464                 irc::string servername = params[0].c_str();
2465                 std::string sname = params[0];
2466                 std::string password = params[1];
2467                 int hops = atoi(params[2].c_str());
2468
2469                 if (hops)
2470                 {
2471                         this->WriteLine("ERROR :Server too far away for authentication");
2472                         Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2473                         return false;
2474                 }
2475                 std::string description = params[3];
2476                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2477                 {
2478                         if ((x->Name == servername) && (x->RecvPass == password))
2479                         {
2480                                 TreeServer* CheckDupe = FindServer(sname);
2481                                 if (CheckDupe)
2482                                 {
2483                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2484                                         Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2485                                         return false;
2486                                 }
2487                                 // Begin the sync here. this kickstarts the
2488                                 // other side, waiting in WAIT_AUTH_2 state,
2489                                 // into starting their burst, as it shows
2490                                 // that we're happy.
2491                                 this->LinkState = CONNECTED;
2492                                 // we should add the details of this server now
2493                                 // to the servers tree, as a child of the root
2494                                 // node.
2495                                 TreeServer* Node = new TreeServer(sname,description,TreeRoot,this);
2496                                 TreeRoot->AddChild(Node);
2497                                 params[3] = ":" + params[3];
2498                                 DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,sname);
2499                                 this->bursting = true;
2500                                 this->DoBurst(Node);
2501                                 return true;
2502                         }
2503                 }
2504                 this->WriteLine("ERROR :Invalid credentials");
2505                 Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, invalid link credentials");
2506                 return false;
2507         }
2508
2509         bool Inbound_Server(std::deque<std::string> &params)
2510         {
2511                 if (params.size() < 4)
2512                         return false;
2513
2514                 irc::string servername = params[0].c_str();
2515                 std::string sname = params[0];
2516                 std::string password = params[1];
2517                 int hops = atoi(params[2].c_str());
2518
2519                 if (hops)
2520                 {
2521                         this->WriteLine("ERROR :Server too far away for authentication");
2522                         Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2523                         return false;
2524                 }
2525                 std::string description = params[3];
2526                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2527                 {
2528                         if ((x->Name == servername) && (x->RecvPass == password))
2529                         {
2530                                 TreeServer* CheckDupe = FindServer(sname);
2531                                 if (CheckDupe)
2532                                 {
2533                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2534                                         Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2535                                         return false;
2536                                 }
2537                                 /* If the config says this link is encrypted, but the remote side
2538                                  * hasnt bothered to send the AES command before SERVER, then we
2539                                  * boot them off as we MUST have this connection encrypted.
2540                                  */
2541                                 if ((x->EncryptionKey != "") && (!this->ctx_in))
2542                                 {
2543                                         this->WriteLine("ERROR :This link requires AES encryption to be enabled. Plaintext connection refused.");
2544                                         Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, remote server did not enable AES.");
2545                                         return false;
2546                                 }
2547                                 Srv->SendOpers("*** Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
2548                                 this->InboundServerName = sname;
2549                                 this->InboundDescription = description;
2550                                 // this is good. Send our details: Our server name and description and hopcount of 0,
2551                                 // along with the sendpass from this block.
2552                                 this->WriteLine("SERVER "+Srv->GetServerName()+" "+x->SendPass+" 0 :"+Srv->GetServerDescription());
2553                                 // move to the next state, we are now waiting for THEM.
2554                                 this->LinkState = WAIT_AUTH_2;
2555                                 return true;
2556                         }
2557                 }
2558                 this->WriteLine("ERROR :Invalid credentials");
2559                 Srv->SendOpers("*** Server connection from \2"+sname+"\2 denied, invalid link credentials");
2560                 return false;
2561         }
2562
2563         void Split(std::string line, std::deque<std::string> &n)
2564         {
2565                 n.clear();
2566                 irc::tokenstream tokens(line);
2567                 std::string param;
2568                 while ((param = tokens.GetToken()) != "")
2569                         n.push_back(param);
2570                 return;
2571         }
2572
2573         bool ProcessLine(std::string line)
2574         {
2575                 std::deque<std::string> params;
2576                 irc::string command;
2577                 std::string prefix;
2578
2579                 if (line.empty())
2580                         return true;
2581
2582                 line = line.substr(0, line.find_first_of("\r\n"));
2583
2584                 log(DEBUG,"IN: %s", line.c_str());
2585
2586                 this->Split(line.c_str(),params);
2587
2588                 if ((params[0][0] == ':') && (params.size() > 1))
2589                 {
2590                         prefix = params[0].substr(1);
2591                         params.pop_front();
2592                 }
2593
2594                 command = params[0].c_str();
2595                 params.pop_front();
2596
2597                 if ((!this->ctx_in) && (command == "AES"))
2598                 {
2599                         std::string sserv = params[0];
2600                         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
2601                         {
2602                                 if ((x->EncryptionKey != "") && (x->Name == sserv))
2603                                 {
2604                                         this->InitAES(x->EncryptionKey,sserv);
2605                                 }
2606                         }
2607
2608                         return true;
2609                 }
2610                 else if ((this->ctx_in) && (command == "AES"))
2611                 {
2612                         WriteOpers("*** \2AES\2: Encryption already enabled on this connection yet %s is trying to enable it twice!",params[0].c_str());
2613                 }
2614
2615                 switch (this->LinkState)
2616                 {
2617                         TreeServer* Node;
2618
2619                         case WAIT_AUTH_1:
2620                                 // Waiting for SERVER command from remote server. Server initiating
2621                                 // the connection sends the first SERVER command, listening server
2622                                 // replies with theirs if its happy, then if the initiator is happy,
2623                                 // it starts to send its net sync, which starts the merge, otherwise
2624                                 // it sends an ERROR.
2625                                 if (command == "PASS")
2626                                 {
2627                                         /* Silently ignored */
2628                                 }
2629                                 else if (command == "SERVER")
2630                                 {
2631                                         return this->Inbound_Server(params);
2632                                 }
2633                                 else if (command == "ERROR")
2634                                 {
2635                                         return this->Error(params);
2636                                 }
2637                                 else if (command == "USER")
2638                                 {
2639                                         this->WriteLine("ERROR :Client connections to this port are prohibited.");
2640                                         return false;
2641                                 }
2642                                 else if (command == "CAPAB")
2643                                 {
2644                                         return this->Capab(params);
2645                                 }
2646                                 else if ((command == "U") || (command == "S"))
2647                                 {
2648                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
2649                                         return false;
2650                                 }
2651                                 else
2652                                 {
2653                                         this->WriteLine("ERROR :Invalid command in negotiation phase.");
2654                                         return false;
2655                                 }
2656                         break;
2657                         case WAIT_AUTH_2:
2658                                 // Waiting for start of other side's netmerge to say they liked our
2659                                 // password.
2660                                 if (command == "SERVER")
2661                                 {
2662                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
2663                                         // silently ignore.
2664                                         return true;
2665                                 }
2666                                 else if ((command == "U") || (command == "S"))
2667                                 {
2668                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
2669                                         return false;
2670                                 }
2671                                 else if (command == "BURST")
2672                                 {
2673                                         if (params.size())
2674                                         {
2675                                                 /* If a time stamp is provided, try and check syncronization */
2676                                                 time_t THEM = atoi(params[0].c_str());
2677                                                 long delta = THEM-time(NULL);
2678                                                 if ((delta < -600) || (delta > 600))
2679                                                 {
2680                                                         WriteOpers("*** \2ERROR\2: Your clocks are out by %d seconds (this is more than ten minutes). Link aborted, \2PLEASE SYNC YOUR CLOCKS!\2",abs(delta));
2681                                                         this->WriteLine("ERROR :Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than ten minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
2682                                                         return false;
2683                                                 }
2684                                                 else if ((delta < -60) || (delta > 60))
2685                                                 {
2686                                                         WriteOpers("*** \2WARNING\2: Your clocks are out by %d seconds, please consider synching your clocks.",abs(delta));
2687                                                 }
2688                                         }
2689                                         this->LinkState = CONNECTED;
2690                                         Node = new TreeServer(InboundServerName,InboundDescription,TreeRoot,this);
2691                                         TreeRoot->AddChild(Node);
2692                                         params.clear();
2693                                         params.push_back(InboundServerName);
2694                                         params.push_back("*");
2695                                         params.push_back("1");
2696                                         params.push_back(":"+InboundDescription);
2697                                         DoOneToAllButSender(TreeRoot->GetName(),"SERVER",params,InboundServerName);
2698                                         this->bursting = true;
2699                                         this->DoBurst(Node);
2700                                 }
2701                                 else if (command == "ERROR")
2702                                 {
2703                                         return this->Error(params);
2704                                 }
2705                                 else if (command == "CAPAB")
2706                                 {
2707                                         return this->Capab(params);
2708                                 }
2709
2710                         break;
2711                         case LISTENER:
2712                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
2713                                 return false;
2714                         break;
2715                         case CONNECTING:
2716                                 if (command == "SERVER")
2717                                 {
2718                                         // another server we connected to, which was in WAIT_AUTH_1 state,
2719                                         // has just sent us their credentials. If we get this far, theyre
2720                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
2721                                         // if we're happy with this, we should send our netburst which
2722                                         // kickstarts the merge.
2723                                         return this->Outbound_Reply_Server(params);
2724                                 }
2725                                 else if (command == "ERROR")
2726                                 {
2727                                         return this->Error(params);
2728                                 }
2729                         break;
2730                         case CONNECTED:
2731                                 // This is the 'authenticated' state, when all passwords
2732                                 // have been exchanged and anything past this point is taken
2733                                 // as gospel.
2734
2735                                 if (prefix != "")
2736                                 {
2737                                         std::string direction = prefix;
2738                                         userrec* t = Srv->FindNick(prefix);
2739                                         if (t)
2740                                         {
2741                                                 direction = t->server;
2742                                         }
2743                                         TreeServer* route_back_again = BestRouteTo(direction);
2744                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
2745                                         {
2746                                                 if (route_back_again)
2747                                                         log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
2748                                                 return true;
2749                                         }
2750
2751                                         /* Fix by brain:
2752                                          * When there is activity on the socket, reset the ping counter so
2753                                          * that we're not wasting bandwidth pinging an active server.
2754                                          */
2755                                         route_back_again->SetNextPingTime(time(NULL) + 120);
2756                                         route_back_again->SetPingFlag();
2757                                 }
2758
2759                                 if (command == "SVSMODE")
2760                                 {
2761                                         /* Services expects us to implement
2762                                          * SVSMODE. In inspircd its the same as
2763                                          * MODE anyway.
2764                                          */
2765                                         command = "MODE";
2766                                 }
2767                                 std::string target = "";
2768                                 /* Yes, know, this is a mess. Its reasonably fast though as we're
2769                                  * working with std::string here.
2770                                  */
2771                                 if ((command == "NICK") && (params.size() > 1))
2772                                 {
2773                                         return this->IntroduceClient(prefix,params);
2774                                 }
2775                                 else if (command == "FJOIN")
2776                                 {
2777                                         return this->ForceJoin(prefix,params);
2778                                 }
2779                                 else if (command == "STATS")
2780                                 {
2781                                         return this->Stats(prefix, params);
2782                                 }
2783                                 else if (command == "SERVER")
2784                                 {
2785                                         return this->RemoteServer(prefix,params);
2786                                 }
2787                                 else if (command == "ERROR")
2788                                 {
2789                                         return this->Error(params);
2790                                 }
2791                                 else if (command == "OPERTYPE")
2792                                 {
2793                                         return this->OperType(prefix,params);
2794                                 }
2795                                 else if (command == "FMODE")
2796                                 {
2797                                         return this->ForceMode(prefix,params);
2798                                 }
2799                                 else if (command == "KILL")
2800                                 {
2801                                         return this->RemoteKill(prefix,params);
2802                                 }
2803                                 else if (command == "FTOPIC")
2804                                 {
2805                                         return this->ForceTopic(prefix,params);
2806                                 }
2807                                 else if (command == "REHASH")
2808                                 {
2809                                         return this->RemoteRehash(prefix,params);
2810                                 }
2811                                 else if (command == "METADATA")
2812                                 {
2813                                         return this->MetaData(prefix,params);
2814                                 }
2815                                 else if (command == "PING")
2816                                 {
2817                                         /*
2818                                          * We just got a ping from a server that's bursting.
2819                                          * This can't be right, so set them to not bursting, and
2820                                          * apply their lines.
2821                                          */
2822                                         if (this->bursting)
2823                                         {
2824                                                 this->bursting = false;
2825                                                 apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2826                                         }
2827                                         if (prefix == "")
2828                                         {
2829                                                 prefix = this->GetName();
2830                                         }
2831                                         return this->LocalPing(prefix,params);
2832                                 }
2833                                 else if (command == "PONG")
2834                                 {
2835                                         /*
2836                                          * We just got a pong from a server that's bursting.
2837                                          * This can't be right, so set them to not bursting, and
2838                                          * apply their lines.
2839                                          */
2840                                         if (this->bursting)
2841                                         {
2842                                                 this->bursting = false;
2843                                                 apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2844                                         }
2845                                         if (prefix == "")
2846                                         {
2847                                                 prefix = this->GetName();
2848                                         }
2849                                         return this->LocalPong(prefix,params);
2850                                 }
2851                                 else if (command == "VERSION")
2852                                 {
2853                                         return this->ServerVersion(prefix,params);
2854                                 }
2855                                 else if (command == "FHOST")
2856                                 {
2857                                         return this->ChangeHost(prefix,params);
2858                                 }
2859                                 else if (command == "FNAME")
2860                                 {
2861                                         return this->ChangeName(prefix,params);
2862                                 }
2863                                 else if (command == "ADDLINE")
2864                                 {
2865                                         return this->AddLine(prefix,params);
2866                                 }
2867                                 else if (command == "SVSNICK")
2868                                 {
2869                                         if (prefix == "")
2870                                         {
2871                                                 prefix = this->GetName();
2872                                         }
2873                                         return this->ForceNick(prefix,params);
2874                                 }
2875                                 else if (command == "IDLE")
2876                                 {
2877                                         return this->Whois(prefix,params);
2878                                 }
2879                                 else if (command == "PUSH")
2880                                 {
2881                                         return this->Push(prefix,params);
2882                                 }
2883                                 else if (command == "TIME")
2884                                 {
2885                                         return this->Time(prefix,params);
2886                                 }
2887                                 else if ((command == "KICK") && (IsServer(prefix)))
2888                                 {
2889                                         std::string sourceserv = this->myhost;
2890                                         if (params.size() == 3)
2891                                         {
2892                                                 userrec* user = Srv->FindNick(params[1]);
2893                                                 chanrec* chan = Srv->FindChannel(params[0]);
2894                                                 if (user && chan)
2895                                                 {
2896                                                         server_kick_channel(user,chan,(char*)params[2].c_str(),false);
2897                                                 }
2898                                         }
2899                                         if (this->InboundServerName != "")
2900                                         {
2901                                                 sourceserv = this->InboundServerName;
2902                                         }
2903                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
2904                                 }
2905                                 else if (command == "SVSJOIN")
2906                                 {
2907                                         if (prefix == "")
2908                                         {
2909                                                 prefix = this->GetName();
2910                                         }
2911                                         return this->ServiceJoin(prefix,params);
2912                                 }
2913                                 else if (command == "SQUIT")
2914                                 {
2915                                         if (params.size() == 2)
2916                                         {
2917                                                 this->Squit(FindServer(params[0]),params[1]);
2918                                         }
2919                                         return true;
2920                                 }
2921                                 else if (command == "ENDBURST")
2922                                 {
2923                                         this->bursting = false;
2924                                         apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2925                                         std::string sourceserv = this->myhost;
2926                                         if (this->InboundServerName != "")
2927                                         {
2928                                                 sourceserv = this->InboundServerName;
2929                                         }
2930                                         WriteOpers("*** Received end of netburst from \2%s\2",sourceserv.c_str());
2931                                         return true;
2932                                 }
2933                                 else
2934                                 {
2935                                         // not a special inter-server command.
2936                                         // Emulate the actual user doing the command,
2937                                         // this saves us having a huge ugly parser.
2938                                         userrec* who = Srv->FindNick(prefix);
2939                                         std::string sourceserv = this->myhost;
2940                                         if (this->InboundServerName != "")
2941                                         {
2942                                                 sourceserv = this->InboundServerName;
2943                                         }
2944                                         if (who)
2945                                         {
2946                                                 if ((command == "NICK") && (params.size() > 0))
2947                                                 {
2948                                                         /* On nick messages, check that the nick doesnt
2949                                                          * already exist here. If it does, kill their copy,
2950                                                          * and our copy.
2951                                                          */
2952                                                         userrec* x = Srv->FindNick(params[0]);
2953                                                         if ((x) && (x != who))
2954                                                         {
2955                                                                 std::deque<std::string> p;
2956                                                                 p.push_back(params[0]);
2957                                                                 p.push_back("Nickname collision ("+prefix+" -> "+params[0]+")");
2958                                                                 DoOneToMany(Srv->GetServerName(),"KILL",p);
2959                                                                 p.clear();
2960                                                                 p.push_back(prefix);
2961                                                                 p.push_back("Nickname collision");
2962                                                                 DoOneToMany(Srv->GetServerName(),"KILL",p);
2963                                                                 Srv->QuitUser(x,"Nickname collision ("+prefix+" -> "+params[0]+")");
2964                                                                 userrec* y = Srv->FindNick(prefix);
2965                                                                 if (y)
2966                                                                 {
2967                                                                         Srv->QuitUser(y,"Nickname collision");
2968                                                                 }
2969                                                                 return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
2970                                                         }
2971                                                 }
2972                                                 // its a user
2973                                                 target = who->server;
2974                                                 const char* strparams[127];
2975                                                 for (unsigned int q = 0; q < params.size(); q++)
2976                                                 {
2977                                                         strparams[q] = params[q].c_str();
2978                                                 }
2979                                                 if (!Srv->CallCommandHandler(command.c_str(), strparams, params.size(), who))
2980                                                 {
2981                                                         this->WriteLine("ERROR :Unrecognised command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules");
2982                                                         return false;
2983                                                 }
2984                                         }
2985                                         else
2986                                         {
2987                                                 // its not a user. Its either a server, or somethings screwed up.
2988                                                 if (IsServer(prefix))
2989                                                 {
2990                                                         target = Srv->GetServerName();
2991                                                 }
2992                                                 else
2993                                                 {
2994                                                         log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
2995                                                         return true;
2996                                                 }
2997                                         }
2998                                         return DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
2999
3000                                 }
3001                                 return true;
3002                         break;
3003                 }
3004                 return true;
3005         }
3006
3007         virtual std::string GetName()
3008         {
3009                 std::string sourceserv = this->myhost;
3010                 if (this->InboundServerName != "")
3011                 {
3012                         sourceserv = this->InboundServerName;
3013                 }
3014                 return sourceserv;
3015         }
3016
3017         virtual void OnTimeout()
3018         {
3019                 if (this->LinkState == CONNECTING)
3020                 {
3021                         Srv->SendOpers("*** CONNECT: Connection to \002"+myhost+"\002 timed out.");
3022                 }
3023         }
3024
3025         virtual void OnClose()
3026         {
3027                 // Connection closed.
3028                 // If the connection is fully up (state CONNECTED)
3029                 // then propogate a netsplit to all peers.
3030                 std::string quitserver = this->myhost;
3031                 if (this->InboundServerName != "")
3032                 {
3033                         quitserver = this->InboundServerName;
3034                 }
3035                 TreeServer* s = FindServer(quitserver);
3036                 if (s)
3037                 {
3038                         Squit(s,"Remote host closed the connection");
3039                 }
3040                 WriteOpers("Server '\2%s\2' closed the connection.",quitserver.c_str());
3041         }
3042
3043         virtual int OnIncomingConnection(int newsock, char* ip)
3044         {
3045                 /* To prevent anyone from attempting to flood opers/DDoS by connecting to the server port,
3046                  * or discovering if this port is the server port, we don't allow connections from any
3047                  * IPs for which we don't have a link block.
3048                  */
3049                 bool found = false;
3050                 vector<Link>::iterator i;
3051                 found = (std::find(ValidIPs.begin(), ValidIPs.end(), ip) != ValidIPs.end());
3052                 if (!found)
3053                 {
3054                         WriteOpers("Server connection from %s denied (no link blocks with that IP address)", ip);
3055                         close(newsock);
3056                         return false;
3057                 }
3058                 TreeSocket* s = new TreeSocket(newsock, ip);
3059                 Srv->AddSocket(s);
3060                 return true;
3061         }
3062 };
3063
3064 /** This class is used to resolve server hostnames during /connect and autoconnect.
3065  * As of 1.1, the resolver system is seperated out from InspSocket, so we must do this
3066  * resolver step first ourselves if we need it. This is totally nonblocking, and will
3067  * callback to OnLookupComplete or OnError when completed. Once it has completed we
3068  * will have an IP address which we can then use to continue our connection.
3069  */
3070 class ServernameResolver : public Resolver
3071 {
3072  private:
3073         /** A copy of the Link tag info for what we're connecting to.
3074          * We take a copy, rather than using a pointer, just in case the
3075          * admin takes the tag away and rehashes while the domain is resolving.
3076          */
3077         Link MyLink;
3078  public:
3079         ServernameResolver(const std::string &hostname, Link x) : Resolver(hostname, DNS_QUERY_FORWARD), MyLink(x)
3080         {
3081                 /* Nothing in here, folks */
3082         }
3083
3084         void OnLookupComplete(const std::string &result)
3085         {
3086                 /* Initiate the connection, now that we have an IP to use.
3087                  * Passing a hostname directly to InspSocket causes it to
3088                  * just bail and set its FD to -1.
3089                  */
3090                 TreeServer* CheckDupe = FindServer(MyLink.Name.c_str());
3091                 if (!CheckDupe) /* Check that nobody tried to connect it successfully while we were resolving */
3092                 {
3093                         TreeSocket* newsocket = new TreeSocket(result,MyLink.Port,false,10,MyLink.Name.c_str());
3094                         if (newsocket->GetFd() > -1)
3095                         {
3096                                 /* We're all OK */
3097                                 Srv->AddSocket(newsocket);
3098                         }
3099                         else
3100                         {
3101                                 /* Something barfed, show the opers */
3102                                 WriteOpers("*** CONNECT: Error connecting \002%s\002: %s.",MyLink.Name.c_str(),strerror(errno));
3103                                 delete newsocket;
3104                         }
3105                 }
3106         }
3107
3108         void OnError(ResolverError e, const std::string &errormessage)
3109         {
3110                 /* Ooops! */
3111                 WriteOpers("*** CONNECT: Error connecting \002%s\002: Unable to resolve hostname - %s",MyLink.Name.c_str(),errormessage.c_str());
3112         }
3113 };
3114
3115 class SecurityIPResolver : public Resolver
3116 {
3117  private:
3118         Link MyLink;
3119  public:
3120         SecurityIPResolver(const std::string &hostname, Link x) : Resolver(hostname, DNS_QUERY_FORWARD), MyLink(x)
3121         {
3122         }
3123
3124         void OnLookupComplete(const std::string &result)
3125         {
3126                 log(DEBUG,"Security IP cache: Adding IP address '%s' for Link '%s'",result.c_str(),MyLink.Name.c_str());
3127                 ValidIPs.push_back(result);
3128         }
3129
3130         void OnError(ResolverError e, const std::string &errormessage)
3131         {
3132                 log(DEBUG,"Could not resolve IP associated with Link '%s': %s",MyLink.Name.c_str(),errormessage.c_str());
3133         }
3134 };
3135
3136 void AddThisServer(TreeServer* server, std::deque<TreeServer*> &list)
3137 {
3138         for (unsigned int c = 0; c < list.size(); c++)
3139         {
3140                 if (list[c] == server)
3141                 {
3142                         return;
3143                 }
3144         }
3145         list.push_back(server);
3146 }
3147
3148 // returns a list of DIRECT servernames for a specific channel
3149 void GetListOfServersForChannel(chanrec* c, std::deque<TreeServer*> &list)
3150 {
3151         CUList *ulist = c->GetUsers();
3152         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
3153         {
3154                 if (i->second->fd < 0)
3155                 {
3156                         TreeServer* best = BestRouteTo(i->second->server);
3157                         if (best)
3158                                 AddThisServer(best,list);
3159                 }
3160         }
3161         return;
3162 }
3163
3164 bool DoOneToAllButSenderRaw(std::string data, std::string omit, std::string prefix, irc::string command, std::deque<std::string> &params)
3165 {
3166         TreeServer* omitroute = BestRouteTo(omit);
3167         if ((command == "NOTICE") || (command == "PRIVMSG"))
3168         {
3169                 if (params.size() >= 2)
3170                 {
3171                         /* Prefixes */
3172                         if ((*(params[0].c_str()) == '@') || (*(params[0].c_str()) == '%') || (*(params[0].c_str()) == '+'))
3173                         {
3174                                 params[0] = params[0].substr(1, params[0].length()-1);
3175                         }
3176                         if ((*(params[0].c_str()) != '#') && (*(params[0].c_str()) != '$'))
3177                         {
3178                                 // special routing for private messages/notices
3179                                 userrec* d = Srv->FindNick(params[0]);
3180                                 if (d)
3181                                 {
3182                                         std::deque<std::string> par;
3183                                         par.push_back(params[0]);
3184                                         par.push_back(":"+params[1]);
3185                                         DoOneToOne(prefix,command.c_str(),par,d->server);
3186                                         return true;
3187                                 }
3188                         }
3189                         else if (*(params[0].c_str()) == '$')
3190                         {
3191                                 std::deque<std::string> par;
3192                                 par.push_back(params[0]);
3193                                 par.push_back(":"+params[1]);
3194                                 DoOneToAllButSender(prefix,command.c_str(),par,omitroute->GetName());
3195                                 return true;
3196                         }
3197                         else
3198                         {
3199                                 log(DEBUG,"Channel privmsg going to chan %s",params[0].c_str());
3200                                 chanrec* c = Srv->FindChannel(params[0]);
3201                                 if (c)
3202                                 {
3203                                         std::deque<TreeServer*> list;
3204                                         GetListOfServersForChannel(c,list);
3205                                         log(DEBUG,"Got a list of %d servers",list.size());
3206                                         unsigned int lsize = list.size();
3207                                         for (unsigned int i = 0; i < lsize; i++)
3208                                         {
3209                                                 TreeSocket* Sock = list[i]->GetSocket();
3210                                                 if ((Sock) && (list[i]->GetName() != omit) && (omitroute != list[i]))
3211                                                 {
3212                                                         log(DEBUG,"Writing privmsg to server %s",list[i]->GetName().c_str());
3213                                                         Sock->WriteLine(data);
3214                                                 }
3215                                         }
3216                                         return true;
3217                                 }
3218                         }
3219                 }
3220         }
3221         unsigned int items = TreeRoot->ChildCount();
3222         for (unsigned int x = 0; x < items; x++)
3223         {
3224                 TreeServer* Route = TreeRoot->GetChild(x);
3225                 if ((Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3226                 {
3227                         TreeSocket* Sock = Route->GetSocket();
3228                         Sock->WriteLine(data);
3229                 }
3230         }
3231         return true;
3232 }
3233
3234 bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> &params, std::string omit)
3235 {
3236         TreeServer* omitroute = BestRouteTo(omit);
3237         std::string FullLine = ":" + prefix + " " + command;
3238         unsigned int words = params.size();
3239         for (unsigned int x = 0; x < words; x++)
3240         {
3241                 FullLine = FullLine + " " + params[x];
3242         }
3243         unsigned int items = TreeRoot->ChildCount();
3244         for (unsigned int x = 0; x < items; x++)
3245         {
3246                 TreeServer* Route = TreeRoot->GetChild(x);
3247                 // Send the line IF:
3248                 // The route has a socket (its a direct connection)
3249                 // The route isnt the one to be omitted
3250                 // The route isnt the path to the one to be omitted
3251                 if ((Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3252                 {
3253                         TreeSocket* Sock = Route->GetSocket();
3254                         Sock->WriteLine(FullLine);
3255                 }
3256         }
3257         return true;
3258 }
3259
3260 bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> &params)
3261 {
3262         std::string FullLine = ":" + prefix + " " + command;
3263         unsigned int words = params.size();
3264         for (unsigned int x = 0; x < words; x++)
3265         {
3266                 FullLine = FullLine + " " + params[x];
3267         }
3268         unsigned int items = TreeRoot->ChildCount();
3269         for (unsigned int x = 0; x < items; x++)
3270         {
3271                 TreeServer* Route = TreeRoot->GetChild(x);
3272                 if (Route->GetSocket())
3273                 {
3274                         TreeSocket* Sock = Route->GetSocket();
3275                         Sock->WriteLine(FullLine);
3276                 }
3277         }
3278         return true;
3279 }
3280
3281 bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> &params, std::string target)
3282 {
3283         TreeServer* Route = BestRouteTo(target);
3284         if (Route)
3285         {
3286                 std::string FullLine = ":" + prefix + " " + command;
3287                 unsigned int words = params.size();
3288                 for (unsigned int x = 0; x < words; x++)
3289                 {
3290                         FullLine = FullLine + " " + params[x];
3291                 }
3292                 if (Route->GetSocket())
3293                 {
3294                         TreeSocket* Sock = Route->GetSocket();
3295                         Sock->WriteLine(FullLine);
3296                 }
3297                 return true;
3298         }
3299         else
3300         {
3301                 return true;
3302         }
3303 }
3304
3305 std::vector<TreeSocket*> Bindings;
3306
3307 void ReadConfiguration(bool rebind)
3308 {
3309         Conf = new ConfigReader;
3310         if (rebind)
3311         {
3312                 for (int j =0; j < Conf->Enumerate("bind"); j++)
3313                 {
3314                         std::string Type = Conf->ReadValue("bind","type",j);
3315                         std::string IP = Conf->ReadValue("bind","address",j);
3316                         long Port = Conf->ReadInteger("bind","port",j,true);
3317                         if (Type == "servers")
3318                         {
3319                                 if (IP == "*")
3320                                 {
3321                                         IP = "";
3322                                 }
3323                                 TreeSocket* listener = new TreeSocket(IP.c_str(),Port,true,10);
3324                                 if (listener->GetState() == I_LISTENING)
3325                                 {
3326                                         Srv->AddSocket(listener);
3327                                         Bindings.push_back(listener);
3328                                 }
3329                                 else
3330                                 {
3331                                         log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %d",Port);
3332                                         listener->Close();
3333                                         DELETE(listener);
3334                                 }
3335                         }
3336                 }
3337         }
3338         FlatLinks = Conf->ReadFlag("options","flatlinks",0);
3339         HideULines = Conf->ReadFlag("options","hideulines",0);
3340         LinkBlocks.clear();
3341         ValidIPs.clear();
3342         for (int j =0; j < Conf->Enumerate("link"); j++)
3343         {
3344                 Link L;
3345                 L.Name = (Conf->ReadValue("link","name",j)).c_str();
3346                 L.IPAddr = Conf->ReadValue("link","ipaddr",j);
3347                 L.Port = Conf->ReadInteger("link","port",j,true);
3348                 L.SendPass = Conf->ReadValue("link","sendpass",j);
3349                 L.RecvPass = Conf->ReadValue("link","recvpass",j);
3350                 L.AutoConnect = Conf->ReadInteger("link","autoconnect",j,true);
3351                 L.EncryptionKey =  Conf->ReadValue("link","encryptionkey",j);
3352                 L.HiddenFromStats = Conf->ReadFlag("link","hidden",j);
3353                 L.NextConnectTime = time(NULL) + L.AutoConnect;
3354                 /* Bugfix by brain, do not allow people to enter bad configurations */
3355                 if ((L.IPAddr != "") && (L.RecvPass != "") && (L.SendPass != "") && (L.Name != "") && (L.Port))
3356                 {
3357                         ValidIPs.push_back(L.IPAddr);
3358
3359                         /* Needs resolving */
3360                         insp_inaddr binip;
3361                         if (insp_aton(L.IPAddr.c_str(), &binip) < 1)
3362                         {
3363                                 try
3364                                 {
3365                                         SecurityIPResolver* sr = new SecurityIPResolver(L.IPAddr, L);
3366                                         Srv->AddResolver(sr);
3367                                 }
3368                                 catch (ModuleException& e)
3369                                 {
3370                                         log(DEBUG,"Error in resolver: %s",e.GetReason());
3371                                 }
3372                         }
3373
3374                         LinkBlocks.push_back(L);
3375                         log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
3376                 }
3377                 else
3378                 {
3379                         if (L.IPAddr == "")
3380                         {
3381                                 log(DEFAULT,"Invalid configuration for server '%s', IP address not defined!",L.Name.c_str());
3382                         }
3383                         else if (L.RecvPass == "")
3384                         {
3385                                 log(DEFAULT,"Invalid configuration for server '%s', recvpass not defined!",L.Name.c_str());
3386                         }
3387                         else if (L.SendPass == "")
3388                         {
3389                                 log(DEFAULT,"Invalid configuration for server '%s', sendpass not defined!",L.Name.c_str());
3390                         }
3391                         else if (L.Name == "")
3392                         {
3393                                 log(DEFAULT,"Invalid configuration, link tag without a name!");
3394                         }
3395                         else if (!L.Port)
3396                         {
3397                                 log(DEFAULT,"Invalid configuration for server '%s', no port specified!",L.Name.c_str());
3398                         }
3399                 }
3400         }
3401         DELETE(Conf);
3402 }
3403
3404
3405 class ModuleSpanningTree : public Module
3406 {
3407         std::vector<TreeSocket*> Bindings;
3408         int line;
3409         int NumServers;
3410         unsigned int max_local;
3411         unsigned int max_global;
3412         cmd_rconnect* command_rconnect;
3413
3414  public:
3415
3416         ModuleSpanningTree(Server* Me)
3417                 : Module::Module(Me), max_local(0), max_global(0)
3418         {
3419                 Srv = Me;
3420                 Bindings.clear();
3421
3422                 // Create the root of the tree
3423                 TreeRoot = new TreeServer(Srv->GetServerName(),Srv->GetServerDescription());
3424
3425                 ReadConfiguration(true);
3426
3427                 command_rconnect = new cmd_rconnect(this);
3428                 Srv->AddCommand(command_rconnect);
3429         }
3430
3431         void ShowLinks(TreeServer* Current, userrec* user, int hops)
3432         {
3433                 std::string Parent = TreeRoot->GetName();
3434                 if (Current->GetParent())
3435                 {
3436                         Parent = Current->GetParent()->GetName();
3437                 }
3438                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
3439                 {
3440                         if ((HideULines) && (Srv->IsUlined(Current->GetChild(q)->GetName())))
3441                         {
3442                                 if (*user->oper)
3443                                 {
3444                                          ShowLinks(Current->GetChild(q),user,hops+1);
3445                                 }
3446                         }
3447                         else
3448                         {
3449                                 ShowLinks(Current->GetChild(q),user,hops+1);
3450                         }
3451                 }
3452                 /* Don't display the line if its a uline, hide ulines is on, and the user isnt an oper */
3453                 if ((HideULines) && (Srv->IsUlined(Current->GetName())) && (!*user->oper))
3454                         return;
3455                 WriteServ(user->fd,"364 %s %s %s :%d %s",user->nick,Current->GetName().c_str(),(FlatLinks && (!*user->oper)) ? Srv->GetServerName().c_str() : Parent.c_str(),(FlatLinks && (!*user->oper)) ? 0 : hops,Current->GetDesc().c_str());
3456         }
3457
3458         int CountLocalServs()
3459         {
3460                 return TreeRoot->ChildCount();
3461         }
3462
3463         int CountServs()
3464         {
3465                 return serverlist.size();
3466         }
3467
3468         void HandleLinks(const char** parameters, int pcnt, userrec* user)
3469         {
3470                 ShowLinks(TreeRoot,user,0);
3471                 WriteServ(user->fd,"365 %s * :End of /LINKS list.",user->nick);
3472                 return;
3473         }
3474
3475         void HandleLusers(const char** parameters, int pcnt, userrec* user)
3476         {
3477                 unsigned int n_users = usercnt();
3478
3479                 /* Only update these when someone wants to see them, more efficient */
3480                 if ((unsigned int)local_count() > max_local)
3481                         max_local = local_count();
3482                 if (n_users > max_global)
3483                         max_global = n_users;
3484
3485                 WriteServ(user->fd,"251 %s :There are %d users and %d invisible on %d servers",user->nick,n_users-usercount_invisible(),usercount_invisible(),this->CountServs());
3486                 if (usercount_opers())
3487                         WriteServ(user->fd,"252 %s %d :operator(s) online",user->nick,usercount_opers());
3488                 if (usercount_unknown())
3489                         WriteServ(user->fd,"253 %s %d :unknown connections",user->nick,usercount_unknown());
3490                 if (chancount())
3491                         WriteServ(user->fd,"254 %s %d :channels formed",user->nick,chancount());
3492                 WriteServ(user->fd,"254 %s :I have %d clients and %d servers",user->nick,local_count(),this->CountLocalServs());
3493                 WriteServ(user->fd,"265 %s :Current Local Users: %d  Max: %d",user->nick,local_count(),max_local);
3494                 WriteServ(user->fd,"266 %s :Current Global Users: %d  Max: %d",user->nick,n_users,max_global);
3495                 return;
3496         }
3497
3498         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
3499
3500         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80], float &totusers, float &totservers)
3501         {
3502                 if (line < 128)
3503                 {
3504                         for (int t = 0; t < depth; t++)
3505                         {
3506                                 matrix[line][t] = ' ';
3507                         }
3508
3509                         // For Aligning, we need to work out exactly how deep this thing is, and produce
3510                         // a 'Spacer' String to compensate.
3511                         char spacer[40];
3512
3513                         memset(spacer,' ',40);
3514                         if ((40 - Current->GetName().length() - depth) > 1) {
3515                                 spacer[40 - Current->GetName().length() - depth] = '\0';
3516                         }
3517                         else
3518                         {
3519                                 spacer[5] = '\0';
3520                         }
3521
3522                         float percent;
3523                         char text[80];
3524                         if (clientlist.size() == 0) {
3525                                 // If there are no users, WHO THE HELL DID THE /MAP?!?!?!
3526                                 percent = 0;
3527                         }
3528                         else
3529                         {
3530                                 percent = ((float)Current->GetUserCount() / (float)clientlist.size()) * 100;
3531                         }
3532                         snprintf(text, 80, "%s %s%5d [%5.2f%%]", Current->GetName().c_str(), spacer, Current->GetUserCount(), percent);
3533                         totusers += Current->GetUserCount();
3534                         totservers++;
3535                         strlcpy(&matrix[line][depth],text,80);
3536                         line++;
3537                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
3538                         {
3539                                 if ((HideULines) && (Srv->IsUlined(Current->GetChild(q)->GetName())))
3540                                 {
3541                                         if (*user->oper)
3542                                         {
3543                                                 ShowMap(Current->GetChild(q),user,(FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3544                                         }
3545                                 }
3546                                 else
3547                                 {
3548                                         ShowMap(Current->GetChild(q),user,(FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3549                                 }
3550                         }
3551                 }
3552         }
3553
3554         int HandleStats(const char** parameters, int pcnt, userrec* user)
3555         {
3556                 if (pcnt > 1)
3557                 {
3558                         /* Remote STATS, the server is within the 2nd parameter */
3559                         std::deque<std::string> params;
3560                         params.push_back(parameters[0]);
3561                         params.push_back(parameters[1]);
3562                         /* Send it out remotely, generate no reply yet */
3563                         TreeServer* s = FindServerMask(parameters[1]);
3564                         if (s)
3565                         {
3566                                 params[1] = s->GetName();
3567                                 DoOneToOne(user->nick, "STATS", params, s->GetName());
3568                         }
3569                         return 1;
3570                 }
3571                 return 0;
3572         }
3573
3574         // Ok, prepare to be confused.
3575         // After much mulling over how to approach this, it struck me that
3576         // the 'usual' way of doing a /MAP isnt the best way. Instead of
3577         // keeping track of a ton of ascii characters, and line by line
3578         // under recursion working out where to place them using multiplications
3579         // and divisons, we instead render the map onto a backplane of characters
3580         // (a character matrix), then draw the branches as a series of "L" shapes
3581         // from the nodes. This is not only friendlier on CPU it uses less stack.
3582
3583         void HandleMap(const char** parameters, int pcnt, userrec* user)
3584         {
3585                 // This array represents a virtual screen which we will
3586                 // "scratch" draw to, as the console device of an irc
3587                 // client does not provide for a proper terminal.
3588                 float totusers = 0;
3589                 float totservers = 0;
3590                 char matrix[128][80];
3591                 for (unsigned int t = 0; t < 128; t++)
3592                 {
3593                         matrix[t][0] = '\0';
3594                 }
3595                 line = 0;
3596                 // The only recursive bit is called here.
3597                 ShowMap(TreeRoot,user,0,matrix,totusers,totservers);
3598                 // Process each line one by one. The algorithm has a limit of
3599                 // 128 servers (which is far more than a spanning tree should have
3600                 // anyway, so we're ok). This limit can be raised simply by making
3601                 // the character matrix deeper, 128 rows taking 10k of memory.
3602                 for (int l = 1; l < line; l++)
3603                 {
3604                         // scan across the line looking for the start of the
3605                         // servername (the recursive part of the algorithm has placed
3606                         // the servers at indented positions depending on what they
3607                         // are related to)
3608                         int first_nonspace = 0;
3609                         while (matrix[l][first_nonspace] == ' ')
3610                         {
3611                                 first_nonspace++;
3612                         }
3613                         first_nonspace--;
3614                         // Draw the `- (corner) section: this may be overwritten by
3615                         // another L shape passing along the same vertical pane, becoming
3616                         // a |- (branch) section instead.
3617                         matrix[l][first_nonspace] = '-';
3618                         matrix[l][first_nonspace-1] = '`';
3619                         int l2 = l - 1;
3620                         // Draw upwards until we hit the parent server, causing possibly
3621                         // other corners (`-) to become branches (|-)
3622                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
3623                         {
3624                                 matrix[l2][first_nonspace-1] = '|';
3625                                 l2--;
3626                         }
3627                 }
3628                 // dump the whole lot to the user. This is the easy bit, honest.
3629                 for (int t = 0; t < line; t++)
3630                 {
3631                         WriteServ(user->fd,"006 %s :%s",user->nick,&matrix[t][0]);
3632                 }
3633                 float avg_users = totusers / totservers;
3634                 WriteServ(user->fd,"270 %s :%.0f server%s and %.0f user%s, average %.2f users per server",user->nick,totservers,(totservers > 1 ? "s" : ""),totusers,(totusers > 1 ? "s" : ""),avg_users);
3635         WriteServ(user->fd,"007 %s :End of /MAP",user->nick);
3636                 return;
3637         }
3638
3639         int HandleSquit(const char** parameters, int pcnt, userrec* user)
3640         {
3641                 TreeServer* s = FindServerMask(parameters[0]);
3642                 if (s)
3643                 {
3644                         if (s == TreeRoot)
3645                         {
3646                                  WriteServ(user->fd,"NOTICE %s :*** SQUIT: Foolish mortal, you cannot make a server SQUIT itself! (%s matches local server name)",user->nick,parameters[0]);
3647                                 return 1;
3648                         }
3649                         TreeSocket* sock = s->GetSocket();
3650                         if (sock)
3651                         {
3652                                 log(DEBUG,"Splitting server %s",s->GetName().c_str());
3653                                 WriteOpers("*** SQUIT: Server \002%s\002 removed from network by %s",parameters[0],user->nick);
3654                                 sock->Squit(s,"Server quit by "+std::string(user->nick)+"!"+std::string(user->ident)+"@"+std::string(user->host));
3655                                 Srv->RemoveSocket(sock);
3656                         }
3657                         else
3658                         {
3659                                 WriteServ(user->fd,"NOTICE %s :*** SQUIT: The server \002%s\002 is not directly connected.",user->nick,parameters[0]);
3660                         }
3661                 }
3662                 else
3663                 {
3664                          WriteServ(user->fd,"NOTICE %s :*** SQUIT: The server \002%s\002 does not exist on the network.",user->nick,parameters[0]);
3665                 }
3666                 return 1;
3667         }
3668
3669         int HandleTime(const char** parameters, int pcnt, userrec* user)
3670         {
3671                 if ((IS_LOCAL(user)) && (pcnt))
3672                 {
3673                         TreeServer* found = FindServerMask(parameters[0]);
3674                         if (found)
3675                         {
3676                                 // we dont' override for local server
3677                                 if (found == TreeRoot)
3678                                         return 0;
3679
3680                                 std::deque<std::string> params;
3681                                 params.push_back(found->GetName());
3682                                 params.push_back(user->nick);
3683                                 DoOneToOne(Srv->GetServerName(),"TIME",params,found->GetName());
3684                         }
3685                         else
3686                         {
3687                                 WriteServ(user->fd,"402 %s %s :No such server",user->nick,parameters[0]);
3688                         }
3689                 }
3690                 return 1;
3691         }
3692
3693         int HandleRemoteWhois(const char** parameters, int pcnt, userrec* user)
3694         {
3695                 if ((IS_LOCAL(user)) && (pcnt > 1))
3696                 {
3697                         userrec* remote = Srv->FindNick(parameters[1]);
3698                         if ((remote) && (remote->fd < 0))
3699                         {
3700                                 std::deque<std::string> params;
3701                                 params.push_back(parameters[1]);
3702                                 DoOneToOne(user->nick,"IDLE",params,remote->server);
3703                                 return 1;
3704                         }
3705                         else if (!remote)
3706                         {
3707                                 WriteServ(user->fd,"401 %s %s :No such nick/channel",user->nick, parameters[1]);
3708                                 WriteServ(user->fd,"318 %s %s :End of /WHOIS list.",user->nick, parameters[1]);
3709                                 return 1;
3710                         }
3711                 }
3712                 return 0;
3713         }
3714
3715         void DoPingChecks(time_t curtime)
3716         {
3717                 for (unsigned int j = 0; j < TreeRoot->ChildCount(); j++)
3718                 {
3719                         TreeServer* serv = TreeRoot->GetChild(j);
3720                         TreeSocket* sock = serv->GetSocket();
3721                         if (sock)
3722                         {
3723                                 if (curtime >= serv->NextPingTime())
3724                                 {
3725                                         if (serv->AnsweredLastPing())
3726                                         {
3727                                                 sock->WriteLine(":"+Srv->GetServerName()+" PING "+serv->GetName());
3728                                                 serv->SetNextPingTime(curtime + 120);
3729                                         }
3730                                         else
3731                                         {
3732                                                 // they didnt answer, boot them
3733                                                 WriteOpers("*** Server \002%s\002 pinged out",serv->GetName().c_str());
3734                                                 sock->Squit(serv,"Ping timeout");
3735                                                 Srv->RemoveSocket(sock);
3736                                                 return;
3737                                         }
3738                                 }
3739                         }
3740                 }
3741         }
3742
3743         void AutoConnectServers(time_t curtime)
3744         {
3745                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
3746                 {
3747                         if ((x->AutoConnect) && (curtime >= x->NextConnectTime))
3748                         {
3749                                 log(DEBUG,"Auto-Connecting %s",x->Name.c_str());
3750                                 x->NextConnectTime = curtime + x->AutoConnect;
3751                                 TreeServer* CheckDupe = FindServer(x->Name.c_str());
3752                                 if (!CheckDupe)
3753                                 {
3754                                         // an autoconnected server is not connected. Check if its time to connect it
3755                                         WriteOpers("*** AUTOCONNECT: Auto-connecting server \002%s\002 (%lu seconds until next attempt)",x->Name.c_str(),x->AutoConnect);
3756
3757                                         insp_inaddr binip;
3758
3759                                         /* Do we already have an IP? If so, no need to resolve it. */
3760                                         if (insp_aton(x->IPAddr.c_str(), &binip) > 0)
3761                                         {
3762                                                 TreeSocket* newsocket = new TreeSocket(x->IPAddr,x->Port,false,10,x->Name.c_str());
3763                                                 if (newsocket->GetFd() > -1)
3764                                                 {
3765                                                         Srv->AddSocket(newsocket);
3766                                                 }
3767                                                 else
3768                                                 {
3769                                                         WriteOpers("*** AUTOCONNECT: Error autoconnecting \002%s\002: %s.",x->Name.c_str(),strerror(errno));
3770                                                         delete newsocket;
3771                                                 }
3772                                         }
3773                                         else
3774                                         {
3775                                                 try
3776                                                 {
3777                                                         ServernameResolver* snr = new ServernameResolver(x->IPAddr, *x);
3778                                                         Srv->AddResolver(snr);
3779                                                 }
3780                                                 catch (ModuleException& e)
3781                                                 {
3782                                                         log(DEBUG,"Error in resolver: %s",e.GetReason());
3783                                                 }
3784                                         }
3785
3786                                 }
3787                         }
3788                 }
3789         }
3790
3791         int HandleVersion(const char** parameters, int pcnt, userrec* user)
3792         {
3793                 // we've already checked if pcnt > 0, so this is safe
3794                 TreeServer* found = FindServerMask(parameters[0]);
3795                 if (found)
3796                 {
3797                         std::string Version = found->GetVersion();
3798                         WriteServ(user->fd,"351 %s :%s",user->nick,Version.c_str());
3799                         if (found == TreeRoot)
3800                         {
3801                                 std::stringstream out(Config->data005);
3802                                 std::string token = "";
3803                                 std::string line5 = "";
3804                                 int token_counter = 0;
3805
3806                                 while (!out.eof())
3807                                 {
3808                                         out >> token;
3809                                         line5 = line5 + token + " ";
3810                                         token_counter++;
3811
3812                                         if ((token_counter >= 13) || (out.eof() == true))
3813                                         {
3814                                                 WriteServ(user->fd,"005 %s %s:are supported by this server",user->nick,line5.c_str());
3815                                                 line5 = "";
3816                                                 token_counter = 0;
3817                                         }
3818                                 }
3819                         }
3820                 }
3821                 else
3822                 {
3823                         WriteServ(user->fd,"402 %s %s :No such server",user->nick,parameters[0]);
3824                 }
3825                 return 1;
3826         }
3827
3828         int HandleConnect(const char** parameters, int pcnt, userrec* user)
3829         {
3830                 for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
3831                 {
3832                         if (Srv->MatchText(x->Name.c_str(),parameters[0]))
3833                         {
3834                                 TreeServer* CheckDupe = FindServer(x->Name.c_str());
3835                                 if (!CheckDupe)
3836                                 {
3837                                         WriteServ(user->fd,"NOTICE %s :*** CONNECT: Connecting to server: \002%s\002 (%s:%d)",user->nick,x->Name.c_str(),(x->HiddenFromStats ? "<hidden>" : x->IPAddr.c_str()),x->Port);
3838                                         insp_inaddr binip;
3839
3840                                         /* Do we already have an IP? If so, no need to resolve it. */
3841                                         if (insp_aton(x->IPAddr.c_str(), &binip) > 0)
3842                                         {
3843                                                 TreeSocket* newsocket = new TreeSocket(x->IPAddr,x->Port,false,10,x->Name.c_str());
3844                                                 if (newsocket->GetFd() > -1)
3845                                                 {
3846                                                         Srv->AddSocket(newsocket);
3847                                                 }
3848                                                 else
3849                                                 {
3850                                                         WriteOpers("*** CONNECT: Error connecting \002%s\002: %s.",x->Name.c_str(),strerror(errno));
3851                                                         delete newsocket;
3852                                                 }
3853                                         }
3854                                         else
3855                                         {
3856                                                 try
3857                                                 {
3858                                                         ServernameResolver* snr = new ServernameResolver(x->IPAddr, *x);
3859                                                         Srv->AddResolver(snr);
3860                                                 }
3861                                                 catch (ModuleException& e)
3862                                                 {
3863                                                         log(DEBUG,"Error in resolver: %s",e.GetReason());
3864                                                 }
3865                                         }
3866                                         return 1;
3867                                 }
3868                                 else
3869                                 {
3870                                         WriteServ(user->fd,"NOTICE %s :*** CONNECT: Server \002%s\002 already exists on the network and is connected via \002%s\002",user->nick,x->Name.c_str(),CheckDupe->GetParent()->GetName().c_str());
3871                                         return 1;
3872                                 }
3873                         }
3874                 }
3875                 WriteServ(user->fd,"NOTICE %s :*** CONNECT: No server matching \002%s\002 could be found in the config file.",user->nick,parameters[0]);
3876                 return 1;
3877         }
3878
3879         virtual int OnStats(char statschar, userrec* user, string_list &results)
3880         {
3881                 if (statschar == 'c')
3882                 {
3883                         for (unsigned int i = 0; i < LinkBlocks.size(); i++)
3884                         {
3885                                 results.push_back(Srv->GetServerName()+" 213 "+user->nick+" C *@"+(LinkBlocks[i].HiddenFromStats ? "<hidden>" : LinkBlocks[i].IPAddr)+" * "+LinkBlocks[i].Name.c_str()+" "+ConvToStr(LinkBlocks[i].Port)+" "+(LinkBlocks[i].EncryptionKey != "" ? 'e' : '-')+(LinkBlocks[i].AutoConnect ? 'a' : '-')+'s');
3886                                 results.push_back(Srv->GetServerName()+" 244 "+user->nick+" H * * "+LinkBlocks[i].Name.c_str());
3887                         }
3888                         results.push_back(Srv->GetServerName()+" 219 "+user->nick+" "+statschar+" :End of /STATS report");
3889                         WriteOpers("*** Notice: %s '%c' requested by %s (%s@%s)",(!strcmp(user->server,Config->ServerName) ? "Stats" : "Remote stats"),statschar,user->nick,user->ident,user->host);
3890                         return 1;
3891                 }
3892                 return 0;
3893         }
3894
3895         virtual int OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated)
3896         {
3897                 /* If the command doesnt appear to be valid, we dont want to mess with it. */
3898                 if (!validated)
3899                         return 0;
3900
3901                 if (command == "CONNECT")
3902                 {
3903                         return this->HandleConnect(parameters,pcnt,user);
3904                 }
3905                 else if (command == "STATS")
3906                 {
3907                         return this->HandleStats(parameters,pcnt,user);
3908                 }
3909                 else if (command == "SQUIT")
3910                 {
3911                         return this->HandleSquit(parameters,pcnt,user);
3912                 }
3913                 else if (command == "MAP")
3914                 {
3915                         this->HandleMap(parameters,pcnt,user);
3916                         return 1;
3917                 }
3918                 else if ((command == "TIME") && (pcnt > 0))
3919                 {
3920                         return this->HandleTime(parameters,pcnt,user);
3921                 }
3922                 else if (command == "LUSERS")
3923                 {
3924                         this->HandleLusers(parameters,pcnt,user);
3925                         return 1;
3926                 }
3927                 else if (command == "LINKS")
3928                 {
3929                         this->HandleLinks(parameters,pcnt,user);
3930                         return 1;
3931                 }
3932                 else if (command == "WHOIS")
3933                 {
3934                         if (pcnt > 1)
3935                         {
3936                                 // remote whois
3937                                 return this->HandleRemoteWhois(parameters,pcnt,user);
3938                         }
3939                 }
3940                 else if ((command == "VERSION") && (pcnt > 0))
3941                 {
3942                         this->HandleVersion(parameters,pcnt,user);
3943                         return 1;
3944                 }
3945                 else if (Srv->IsValidModuleCommand(command, pcnt, user))
3946                 {
3947                         // this bit of code cleverly routes all module commands
3948                         // to all remote severs *automatically* so that modules
3949                         // can just handle commands locally, without having
3950                         // to have any special provision in place for remote
3951                         // commands and linking protocols.
3952                         std::deque<std::string> params;
3953                         params.clear();
3954                         for (int j = 0; j < pcnt; j++)
3955                         {
3956                                 if (strchr(parameters[j],' '))
3957                                 {
3958                                         params.push_back(":" + std::string(parameters[j]));
3959                                 }
3960                                 else
3961                                 {
3962                                         params.push_back(std::string(parameters[j]));
3963                                 }
3964                         }
3965                         log(DEBUG,"Globally route '%s'",command.c_str());
3966                         DoOneToMany(user->nick,command,params);
3967                 }
3968                 return 0;
3969         }
3970
3971         virtual void OnGetServerDescription(const std::string &servername,std::string &description)
3972         {
3973                 TreeServer* s = FindServer(servername);
3974                 if (s)
3975                 {
3976                         description = s->GetDesc();
3977                 }
3978         }
3979
3980         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
3981         {
3982                 if (IS_LOCAL(source))
3983                 {
3984                         std::deque<std::string> params;
3985                         params.push_back(dest->nick);
3986                         params.push_back(channel->name);
3987                         DoOneToMany(source->nick,"INVITE",params);
3988                 }
3989         }
3990
3991         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, const std::string &topic)
3992         {
3993                 std::deque<std::string> params;
3994                 params.push_back(chan->name);
3995                 params.push_back(":"+topic);
3996                 DoOneToMany(user->nick,"TOPIC",params);
3997         }
3998
3999         virtual void OnWallops(userrec* user, const std::string &text)
4000         {
4001                 if (IS_LOCAL(user))
4002                 {
4003                         std::deque<std::string> params;
4004                         params.push_back(":"+text);
4005                         DoOneToMany(user->nick,"WALLOPS",params);
4006                 }
4007         }
4008
4009         virtual void OnUserNotice(userrec* user, void* dest, int target_type, const std::string &text, char status)
4010         {
4011                 if (target_type == TYPE_USER)
4012                 {
4013                         userrec* d = (userrec*)dest;
4014                         if ((d->fd < 0) && (IS_LOCAL(user)))
4015                         {
4016                                 std::deque<std::string> params;
4017                                 params.clear();
4018                                 params.push_back(d->nick);
4019                                 params.push_back(":"+text);
4020                                 DoOneToOne(user->nick,"NOTICE",params,d->server);
4021                         }
4022                 }
4023                 else if (target_type == TYPE_CHANNEL)
4024                 {
4025                         if (IS_LOCAL(user))
4026                         {
4027                                 chanrec *c = (chanrec*)dest;
4028                                 std::string cname = c->name;
4029                                 if (status)
4030                                         cname = status + cname;
4031                                 std::deque<TreeServer*> list;
4032                                 GetListOfServersForChannel(c,list);
4033                                 unsigned int ucount = list.size();
4034                                 for (unsigned int i = 0; i < ucount; i++)
4035                                 {
4036                                         TreeSocket* Sock = list[i]->GetSocket();
4037                                         if (Sock)
4038                                                 Sock->WriteLine(":"+std::string(user->nick)+" NOTICE "+cname+" :"+text);
4039                                 }
4040                         }
4041                 }
4042                 else if (target_type == TYPE_SERVER)
4043                 {
4044                         if (IS_LOCAL(user))
4045                         {
4046                                 char* target = (char*)dest;
4047                                 std::deque<std::string> par;
4048                                 par.push_back(target);
4049                                 par.push_back(":"+text);
4050                                 DoOneToMany(user->nick,"NOTICE",par);
4051                         }
4052                 }
4053         }
4054
4055         virtual void OnUserMessage(userrec* user, void* dest, int target_type, const std::string &text, char status)
4056         {
4057                 if (target_type == TYPE_USER)
4058                 {
4059                         // route private messages which are targetted at clients only to the server
4060                         // which needs to receive them
4061                         userrec* d = (userrec*)dest;
4062                         if ((d->fd < 0) && (IS_LOCAL(user)))
4063                         {
4064                                 std::deque<std::string> params;
4065                                 params.clear();
4066                                 params.push_back(d->nick);
4067                                 params.push_back(":"+text);
4068                                 DoOneToOne(user->nick,"PRIVMSG",params,d->server);
4069                         }
4070                 }
4071                 else if (target_type == TYPE_CHANNEL)
4072                 {
4073                         if (IS_LOCAL(user))
4074                         {
4075                                 chanrec *c = (chanrec*)dest;
4076                                 std::string cname = c->name;
4077                                 if (status)
4078                                         cname = status + cname;
4079                                 std::deque<TreeServer*> list;
4080                                 GetListOfServersForChannel(c,list);
4081                                 unsigned int ucount = list.size();
4082                                 for (unsigned int i = 0; i < ucount; i++)
4083                                 {
4084                                         TreeSocket* Sock = list[i]->GetSocket();
4085                                         if (Sock)
4086                                                 Sock->WriteLine(":"+std::string(user->nick)+" PRIVMSG "+cname+" :"+text);
4087                                 }
4088                         }
4089                 }
4090                 else if (target_type == TYPE_SERVER)
4091                 {
4092                         if (IS_LOCAL(user))
4093                         {
4094                                 char* target = (char*)dest;
4095                                 std::deque<std::string> par;
4096                                 par.push_back(target);
4097                                 par.push_back(":"+text);
4098                                 DoOneToMany(user->nick,"PRIVMSG",par);
4099                         }
4100                 }
4101         }
4102
4103         virtual void OnBackgroundTimer(time_t curtime)
4104         {
4105                 AutoConnectServers(curtime);
4106                 DoPingChecks(curtime);
4107         }
4108
4109         virtual void OnUserJoin(userrec* user, chanrec* channel)
4110         {
4111                 // Only do this for local users
4112                 if (IS_LOCAL(user))
4113                 {
4114                         std::deque<std::string> params;
4115                         params.clear();
4116                         params.push_back(channel->name);
4117
4118                         if (channel->GetUserCounter() > 1)
4119                         {
4120                                 // not the first in the channel
4121                                 DoOneToMany(user->nick,"JOIN",params);
4122                         }
4123                         else
4124                         {
4125                                 // first in the channel, set up their permissions
4126                                 // and the channel TS with FJOIN.
4127                                 char ts[24];
4128                                 snprintf(ts,24,"%lu",(unsigned long)channel->age);
4129                                 params.clear();
4130                                 params.push_back(channel->name);
4131                                 params.push_back(ts);
4132                                 params.push_back("@"+std::string(user->nick));
4133                                 DoOneToMany(Srv->GetServerName(),"FJOIN",params);
4134                         }
4135                 }
4136         }
4137
4138         virtual void OnChangeHost(userrec* user, const std::string &newhost)
4139         {
4140                 // only occurs for local clients
4141                 if (user->registered != REG_ALL)
4142                         return;
4143                 std::deque<std::string> params;
4144                 params.push_back(newhost);
4145                 DoOneToMany(user->nick,"FHOST",params);
4146         }
4147
4148         virtual void OnChangeName(userrec* user, const std::string &gecos)
4149         {
4150                 // only occurs for local clients
4151                 if (user->registered != REG_ALL)
4152                         return;
4153                 std::deque<std::string> params;
4154                 params.push_back(gecos);
4155                 DoOneToMany(user->nick,"FNAME",params);
4156         }
4157
4158         virtual void OnUserPart(userrec* user, chanrec* channel, const std::string &partmessage)
4159         {
4160                 if (IS_LOCAL(user))
4161                 {
4162                         std::deque<std::string> params;
4163                         params.push_back(channel->name);
4164                         if (partmessage != "")
4165                                 params.push_back(":"+partmessage);
4166                         DoOneToMany(user->nick,"PART",params);
4167                 }
4168         }
4169
4170         virtual void OnUserConnect(userrec* user)
4171         {
4172                 char agestr[MAXBUF];
4173                 if (IS_LOCAL(user))
4174                 {
4175                         std::deque<std::string> params;
4176                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
4177                         params.push_back(agestr);
4178                         params.push_back(user->nick);
4179                         params.push_back(user->host);
4180                         params.push_back(user->dhost);
4181                         params.push_back(user->ident);
4182                         params.push_back("+"+std::string(user->FormatModes()));
4183                         params.push_back(user->GetIPString());
4184                         params.push_back(":"+std::string(user->fullname));
4185                         DoOneToMany(Srv->GetServerName(),"NICK",params);
4186
4187                         // User is Local, change needs to be reflected!
4188                         TreeServer* SourceServer = FindServer(user->server);
4189                         if (SourceServer)
4190                         {
4191                                 SourceServer->AddUserCount();
4192                         }
4193
4194                 }
4195         }
4196
4197         virtual void OnUserQuit(userrec* user, const std::string &reason)
4198         {
4199                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4200                 {
4201                         std::deque<std::string> params;
4202                         params.push_back(":"+reason);
4203                         DoOneToMany(user->nick,"QUIT",params);
4204                 }
4205                 // Regardless, We need to modify the user Counts..
4206                 TreeServer* SourceServer = FindServer(user->server);
4207                 if (SourceServer)
4208                 {
4209                         SourceServer->DelUserCount();
4210                 }
4211
4212         }
4213
4214         virtual void OnUserPostNick(userrec* user, const std::string &oldnick)
4215         {
4216                 if (IS_LOCAL(user))
4217                 {
4218                         std::deque<std::string> params;
4219                         params.push_back(user->nick);
4220                         DoOneToMany(oldnick,"NICK",params);
4221                 }
4222         }
4223
4224         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, const std::string &reason)
4225         {
4226                 if ((source) && (IS_LOCAL(source)))
4227                 {
4228                         std::deque<std::string> params;
4229                         params.push_back(chan->name);
4230                         params.push_back(user->nick);
4231                         params.push_back(":"+reason);
4232                         DoOneToMany(source->nick,"KICK",params);
4233                 }
4234                 else if (!source)
4235                 {
4236                         std::deque<std::string> params;
4237                         params.push_back(chan->name);
4238                         params.push_back(user->nick);
4239                         params.push_back(":"+reason);
4240                         DoOneToMany(Srv->GetServerName(),"KICK",params);
4241                 }
4242         }
4243
4244         virtual void OnRemoteKill(userrec* source, userrec* dest, const std::string &reason)
4245         {
4246                 std::deque<std::string> params;
4247                 params.push_back(dest->nick);
4248                 params.push_back(":"+reason);
4249                 DoOneToMany(source->nick,"KILL",params);
4250         }
4251
4252         virtual void OnRehash(const std::string &parameter)
4253         {
4254                 if (parameter != "")
4255                 {
4256                         std::deque<std::string> params;
4257                         params.push_back(parameter);
4258                         DoOneToMany(Srv->GetServerName(),"REHASH",params);
4259                         // check for self
4260                         if (Srv->MatchText(Srv->GetServerName(),parameter))
4261                         {
4262                                 Srv->SendOpers("*** Remote rehash initiated from server \002"+Srv->GetServerName()+"\002.");
4263                                 Srv->RehashServer();
4264                         }
4265                 }
4266                 ReadConfiguration(false);
4267         }
4268
4269         // note: the protocol does not allow direct umode +o except
4270         // via NICK with 8 params. sending OPERTYPE infers +o modechange
4271         // locally.
4272         virtual void OnOper(userrec* user, const std::string &opertype)
4273         {
4274                 if (IS_LOCAL(user))
4275                 {
4276                         std::deque<std::string> params;
4277                         params.push_back(opertype);
4278                         DoOneToMany(user->nick,"OPERTYPE",params);
4279                 }
4280         }
4281
4282         void OnLine(userrec* source, const std::string &host, bool adding, char linetype, long duration, const std::string &reason)
4283         {
4284                 if (IS_LOCAL(source))
4285                 {
4286                         char type[8];
4287                         snprintf(type,8,"%cLINE",linetype);
4288                         std::string stype = type;
4289                         if (adding)
4290                         {
4291                                 char sduration[MAXBUF];
4292                                 snprintf(sduration,MAXBUF,"%ld",duration);
4293                                 std::deque<std::string> params;
4294                                 params.push_back(host);
4295                                 params.push_back(sduration);
4296                                 params.push_back(":"+reason);
4297                                 DoOneToMany(source->nick,stype,params);
4298                         }
4299                         else
4300                         {
4301                                 std::deque<std::string> params;
4302                                 params.push_back(host);
4303                                 DoOneToMany(source->nick,stype,params);
4304                         }
4305                 }
4306         }
4307
4308         virtual void OnAddGLine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4309         {
4310                 OnLine(source,hostmask,true,'G',duration,reason);
4311         }
4312
4313         virtual void OnAddZLine(long duration, userrec* source, const std::string &reason, const std::string &ipmask)
4314         {
4315                 OnLine(source,ipmask,true,'Z',duration,reason);
4316         }
4317
4318         virtual void OnAddQLine(long duration, userrec* source, const std::string &reason, const std::string &nickmask)
4319         {
4320                 OnLine(source,nickmask,true,'Q',duration,reason);
4321         }
4322
4323         virtual void OnAddELine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4324         {
4325                 OnLine(source,hostmask,true,'E',duration,reason);
4326         }
4327
4328         virtual void OnDelGLine(userrec* source, const std::string &hostmask)
4329         {
4330                 OnLine(source,hostmask,false,'G',0,"");
4331         }
4332
4333         virtual void OnDelZLine(userrec* source, const std::string &ipmask)
4334         {
4335                 OnLine(source,ipmask,false,'Z',0,"");
4336         }
4337
4338         virtual void OnDelQLine(userrec* source, const std::string &nickmask)
4339         {
4340                 OnLine(source,nickmask,false,'Q',0,"");
4341         }
4342
4343         virtual void OnDelELine(userrec* source, const std::string &hostmask)
4344         {
4345                 OnLine(source,hostmask,false,'E',0,"");
4346         }
4347
4348         virtual void OnMode(userrec* user, void* dest, int target_type, const std::string &text)
4349         {
4350                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4351                 {
4352                         if (target_type == TYPE_USER)
4353                         {
4354                                 userrec* u = (userrec*)dest;
4355                                 std::deque<std::string> params;
4356                                 params.push_back(u->nick);
4357                                 params.push_back(text);
4358                                 DoOneToMany(user->nick,"MODE",params);
4359                         }
4360                         else
4361                         {
4362                                 chanrec* c = (chanrec*)dest;
4363                                 std::deque<std::string> params;
4364                                 params.push_back(c->name);
4365                                 params.push_back(text);
4366                                 DoOneToMany(user->nick,"MODE",params);
4367                         }
4368                 }
4369         }
4370
4371         virtual void OnSetAway(userrec* user)
4372         {
4373                 if (IS_LOCAL(user))
4374                 {
4375                         std::deque<std::string> params;
4376                         params.push_back(":"+std::string(user->awaymsg));
4377                         DoOneToMany(user->nick,"AWAY",params);
4378                 }
4379         }
4380
4381         virtual void OnCancelAway(userrec* user)
4382         {
4383                 if (IS_LOCAL(user))
4384                 {
4385                         std::deque<std::string> params;
4386                         params.clear();
4387                         DoOneToMany(user->nick,"AWAY",params);
4388                 }
4389         }
4390
4391         virtual void ProtoSendMode(void* opaque, int target_type, void* target, const std::string &modeline)
4392         {
4393                 TreeSocket* s = (TreeSocket*)opaque;
4394                 if (target)
4395                 {
4396                         if (target_type == TYPE_USER)
4397                         {
4398                                 userrec* u = (userrec*)target;
4399                                 s->WriteLine(":"+Srv->GetServerName()+" FMODE "+u->nick+" "+ConvToStr(u->age)+" "+modeline);
4400                         }
4401                         else
4402                         {
4403                                 chanrec* c = (chanrec*)target;
4404                                 s->WriteLine(":"+Srv->GetServerName()+" FMODE "+c->name+" "+ConvToStr(c->age)+" "+modeline);
4405                         }
4406                 }
4407         }
4408
4409         virtual void ProtoSendMetaData(void* opaque, int target_type, void* target, const std::string &extname, const std::string &extdata)
4410         {
4411                 TreeSocket* s = (TreeSocket*)opaque;
4412                 if (target)
4413                 {
4414                         if (target_type == TYPE_USER)
4415                         {
4416                                 userrec* u = (userrec*)target;
4417                                 s->WriteLine(":"+Srv->GetServerName()+" METADATA "+u->nick+" "+extname+" :"+extdata);
4418                         }
4419                         else if (target_type == TYPE_OTHER)
4420                         {
4421                                 s->WriteLine(":"+Srv->GetServerName()+" METADATA * "+extname+" :"+extdata);
4422                         }
4423                         else if (target_type == TYPE_CHANNEL)
4424                         {
4425                                 chanrec* c = (chanrec*)target;
4426                                 s->WriteLine(":"+Srv->GetServerName()+" METADATA "+c->name+" "+extname+" :"+extdata);
4427                         }
4428                 }
4429         }
4430
4431         virtual void OnEvent(Event* event)
4432         {
4433                 if (event->GetEventID() == "send_metadata")
4434                 {
4435                         std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
4436                         if (params->size() < 3)
4437                                 return;
4438                         (*params)[2] = ":" + (*params)[2];
4439                         DoOneToMany(Srv->GetServerName(),"METADATA",*params);
4440                 }
4441                 else if (event->GetEventID() == "send_mode")
4442                 {
4443                         std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
4444                         if (params->size() < 2)
4445                                 return;
4446                         // Insert the TS value of the object, either userrec or chanrec
4447                         time_t ourTS = 0;
4448                         userrec* a = Srv->FindNick((*params)[0]);
4449                         if (a)
4450                         {
4451                                 ourTS = a->age;
4452                         }
4453                         else
4454                         {
4455                                 chanrec* a = Srv->FindChannel((*params)[0]);
4456                                 if (a)
4457                                 {
4458                                         ourTS = a->age;
4459                                 }
4460                         }
4461                         params->insert(params->begin() + 1,ConvToStr(ourTS));
4462                         DoOneToMany(Srv->GetServerName(),"FMODE",*params);
4463                 }
4464         }
4465
4466         virtual ~ModuleSpanningTree()
4467         {
4468         }
4469
4470         virtual Version GetVersion()
4471         {
4472                 return Version(1,0,0,0,VF_STATIC|VF_VENDOR);
4473         }
4474
4475         void Implements(char* List)
4476         {
4477                 List[I_OnPreCommand] = List[I_OnGetServerDescription] = List[I_OnUserInvite] = List[I_OnPostLocalTopicChange] = 1;
4478                 List[I_OnWallops] = List[I_OnUserNotice] = List[I_OnUserMessage] = List[I_OnBackgroundTimer] = 1;
4479                 List[I_OnUserJoin] = List[I_OnChangeHost] = List[I_OnChangeName] = List[I_OnUserPart] = List[I_OnUserConnect] = 1;
4480                 List[I_OnUserQuit] = List[I_OnUserPostNick] = List[I_OnUserKick] = List[I_OnRemoteKill] = List[I_OnRehash] = 1;
4481                 List[I_OnOper] = List[I_OnAddGLine] = List[I_OnAddZLine] = List[I_OnAddQLine] = List[I_OnAddELine] = 1;
4482                 List[I_OnDelGLine] = List[I_OnDelZLine] = List[I_OnDelQLine] = List[I_OnDelELine] = List[I_ProtoSendMode] = List[I_OnMode] = 1;
4483                 List[I_OnStats] = List[I_ProtoSendMetaData] = List[I_OnEvent] = List[I_OnSetAway] = List[I_OnCancelAway] = 1;
4484         }
4485
4486         /* It is IMPORTANT that m_spanningtree is the last module in the chain
4487          * so that any activity it sees is FINAL, e.g. we arent going to send out
4488          * a NICK message before m_cloaking has finished putting the +x on the user,
4489          * etc etc.
4490          * Therefore, we return PRIORITY_LAST to make sure we end up at the END of
4491          * the module call queue.
4492          */
4493         Priority Prioritize()
4494         {
4495                 return PRIORITY_LAST;
4496         }
4497 };
4498
4499
4500 class ModuleSpanningTreeFactory : public ModuleFactory
4501 {
4502  public:
4503         ModuleSpanningTreeFactory()
4504         {
4505         }
4506
4507         ~ModuleSpanningTreeFactory()
4508         {
4509         }
4510
4511         virtual Module * CreateModule(Server* Me)
4512         {
4513                 TreeProtocolModule = new ModuleSpanningTree(Me);
4514                 return TreeProtocolModule;
4515         }
4516
4517 };
4518
4519
4520 extern "C" void * init_module( void )
4521 {
4522         return new ModuleSpanningTreeFactory;
4523 }